/*
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* The contents of this file are subject to the terms of the Common Development and
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* Distribution License (the License). You may not use this file except in compliance with the
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* License.
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*
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* You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
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* specific language governing permission and limitations under the License.
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*
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* When distributing Covered Software, include this CDDL Header Notice in each file and include
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* the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
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* Header, with the fields enclosed by brackets [] replaced by your own identifying
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* information: "Portions copyright [year] [name of copyright owner]".
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*
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* Copyright 2026 3A Systems, LLC.
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*/
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package org.opends.server.replication.plugin;
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import static java.nio.charset.StandardCharsets.*;
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import static org.assertj.core.api.Assertions.*;
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import static org.opends.messages.CoreMessages.ERR_UNCAUGHT_THREAD_EXCEPTION;
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import static org.opends.messages.ReplicationMessages.*;
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import static org.opends.server.TestCaseUtils.*;
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import static org.opends.server.core.DirectoryServer.*;
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import static org.testng.Assert.*;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.SortedSet;
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import java.util.TreeSet;
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import java.util.concurrent.CountDownLatch;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.atomic.AtomicBoolean;
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import java.util.concurrent.atomic.AtomicReference;
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import java.util.function.BooleanSupplier;
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import org.forgerock.opendj.ldap.DN;
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import org.forgerock.opendj.ldap.ResultCode;
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import org.forgerock.opendj.server.config.meta.ReplicationDomainCfgDefn.IsolationPolicy;
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import org.opends.server.TestCaseUtils;
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import org.opends.server.core.DirectoryServer;
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import org.opends.server.plugins.ShortCircuitPlugin;
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import org.opends.server.replication.ReplicationTestCase;
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import org.opends.server.replication.common.CSN;
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import org.opends.server.replication.common.CSNGenerator;
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import org.opends.server.replication.protocol.DeleteMsg;
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import org.opends.server.replication.protocol.DoneMsg;
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import org.opends.server.replication.protocol.EntryMsg;
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import org.opends.server.replication.protocol.ErrorMsg;
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import org.opends.server.replication.protocol.InitializeRequestMsg;
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import org.opends.server.replication.protocol.InitializeTargetMsg;
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import org.opends.server.replication.protocol.LDAPUpdateMsg;
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import org.opends.server.replication.protocol.ModifyMsg;
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import org.opends.server.replication.protocol.UpdateMsg;
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import org.opends.server.replication.server.ReplServerFakeConfiguration;
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import org.opends.server.replication.server.ReplicationServer;
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import org.opends.server.replication.service.ReplicationBroker;
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import org.opends.server.types.DirectoryException;
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import org.opends.server.types.Entry;
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import org.opends.server.types.OperationType;
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import org.testng.Assert;
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import org.testng.annotations.AfterMethod;
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import org.testng.annotations.BeforeMethod;
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import org.testng.annotations.Test;
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/**
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* Tests the replay of a change while this replica is the target of a total update.
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* <p>
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* The import of a total update streams over the session of the domain, on its listener
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* thread, and the backend it replaces is deregistered for the length of it. A change which
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* was queued for replay before the {@code InitializeTargetMsg} arrived is replayed into no
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* backend: whatever such a replay decides is about to be overwritten by the import, and the
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* one thing it must not do is stop the session the import is reading (issue #956). The same
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* holds from the moment the total update is asked for: the answer to the request arrives
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* over that session, so a replay which fails while it is on its way must not restart it.
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* A restart asked for before the total update took the session, and left standing for the
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* length of it, is not run once it is over either: the change it was asked for is gone with
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* the ServerState the import replaced. The changes a replay which is unwound had parked as
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* waiting for another one are released on the same terms, and nothing more is done for them
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* (issue #954).
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* <p>
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* The exporter is a broker of this test, so that the test says when the entries arrive: the
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* change is replayed while the import is waiting for them - or, for the request, while the
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* exporter is holding the answer.
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* <p>
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* The claim of a total update this replica did not ask for is made by the listener thread
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* under no lock, so a restart of the session which reads no owner a moment before that claim
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* would stop the session the import is about to read (issue #1041): the listener is held
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* before its claim, and what stops the session is driven through the gap.
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* <p>
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* The {@code timeOut} each case declares is what it is expected to take at the most; it is
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* not what bounds it. {@code TestListener} sets the timeout of every test method from the
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* {@code org.opends.test.timeout} property, ten minutes under Maven and none outside it.
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*/
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@SuppressWarnings("javadoc")
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public class ReplayDuringImportTest extends ReplicationTestCase
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{
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/**
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* The memory backend of {@code o=test} loses its data when it is disabled and enabled
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* back, which is what an import does to the backend it replaces: a total update needs a
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* backend which keeps what was imported into it.
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*/
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private static final String EXAMPLE_DN = "dc=example,dc=com";
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private static final int RS_ID = 611;
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private static final int DS_ID = 1;
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private static final int EXPORTER_ID = 2;
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private static final int INIT_WINDOW = 100;
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private static final AtomicBoolean SHUTDOWN = new AtomicBoolean(false);
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/** An entry of the exporter's data, and its entryUUID. */
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private static final String IMPORTED_ENTRY_DN = "cn=imported,ou=People," + EXAMPLE_DN;
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private static final String IMPORTED_ENTRY_UUID = "21111111-1111-1111-1111-111111111113";
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private DN baseDN;
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private ReplicationServer replicationServer;
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private LDAPReplicationDomain domain;
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private TestSynchronousReplayQueue queue;
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private ReplicationBroker exporter;
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private CSNGenerator gen;
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@BeforeMethod
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public void setUpLocal() throws Exception
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{
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baseDN = DN.valueOf(EXAMPLE_DN);
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TestCaseUtils.clearBackend("userRoot", EXAMPLE_DN);
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final int rsPort = TestCaseUtils.findFreePort();
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replicationServer = new ReplicationServer(new ReplServerFakeConfiguration(
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rsPort, "replayDuringImportTestDb", 0, RS_ID, 0, 100, new TreeSet<String>()));
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final SortedSet<String> replServers = new TreeSet<>();
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replServers.add("localhost:" + rsPort);
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final DomainFakeCfg conf = new DomainFakeCfg(baseDN, DS_ID, replServers);
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conf.setIsolationPolicy(IsolationPolicy.ACCEPT_ALL_UPDATES);
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queue = new TestSynchronousReplayQueue();
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domain = MultimasterReplication.createNewDomain(conf, queue);
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domain.start();
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assertTrue(domain.isConnected(), "the domain did not connect to the replication server");
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exporter = openReplicationSession(baseDN, EXPORTER_ID, 100, rsPort, 10000);
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gen = new CSNGenerator(201, 0);
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}
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@AfterMethod
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public void tearDown() throws Exception
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{
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try
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{
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stop(exporter);
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MultimasterReplication.deleteDomain(baseDN);
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}
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finally
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{
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remove(replicationServer);
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}
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}
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/**
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* A change replayed while the import streams must leave the session to the import.
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* <p>
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* The change is given back at the top of its first attempt: the data it would be applied
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* to is being replaced, so nothing is attempted into the backend the import took away,
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* nothing is reported, and the session is left to the import - which streams every entry
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* to its end. Without the hold-off the operation is refused with NO_SUCH_OBJECT - nothing
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* serves the base DN - and the entryUUID search conflict resolution reads the data with
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* can not run either: the attempts in place are spent into no backend and the exit
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* reports the change; without the owner the total update is, the session is then
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* restarted for the change to be delivered again, which stops the broker the import is
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* reading, and the import ends on the entries which had arrived with nothing to say it.
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*/
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@Test(timeOut = 120_000)
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public void aReplayDuringTheImportLeavesTheSessionToTheImport() throws Exception
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{
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final Entry entry = TestCaseUtils.addEntry(
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"dn: cn=renamedSince," + EXAMPLE_DN,
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"objectClass: top",
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"objectClass: person",
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"cn: renamedSince",
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"sn: renamedSince");
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final String entryUUID = getEntryUUID(entry.getName());
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final String[] exported = exportedEntries();
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startImportInto(exported.length);
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// Queued before the InitializeTargetMsg arrived, replayed into no backend.
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final CSN csn = gen.newCSN();
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replayMsg(new ModifyMsg(csn, DN.valueOf("cn=movedAway," + EXAMPLE_DN),
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generatemods("description", "replayed during the import"), entryUUID));
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finishImport(exported);
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for (String ldif : exported)
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{
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final DN dn = dnOf(ldif);
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assertTrue(entryExists(dn), "the import ended before " + dn
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+ " arrived: the session it streams over was stopped from under it");
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}
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/*
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* The two roads which leave the session to the import are told apart here: the
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* hold-off gives the change back before an attempt is made, the guard on the restart
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* after the attempts are spent. The exhaustion exit is the one thing the first road
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* leaves no record of.
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*/
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assertThat(errorLogRecordsOf(ERR_ERROR_REPLAYING_OPERATION.ordinal(), csn))
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.as("the change was attempted into no backend instead of being given back at once")
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.isEmpty();
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assertThat(errorLogRecordsOf(WARN_REPLAY_RETRYING_CHANGE.ordinal(), csn))
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.as("the change was asked for again, which restarts the session the import streams over")
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.isEmpty();
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}
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/**
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* A change given back while the import ran must not hold the ServerState back once the
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* import has replaced the data.
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* <p>
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* A change which is given back stays listed as pending and uncommitted - that is what
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* has the replication server send it again - and a commit advances the ServerState no
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* further than the oldest uncommitted change. The state the import loads is the
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* exporter's, which covers the change already, so nothing sends it again: left listed,
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* it would stop the ServerState of this replica for good.
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*/
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@Test(timeOut = 120_000)
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public void aChangeGivenBackDuringTheImportDoesNotHoldTheServerStateBack() throws Exception
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{
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final Entry entry = TestCaseUtils.addEntry(
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"dn: cn=renamedSince," + EXAMPLE_DN,
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"objectClass: top",
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"objectClass: person",
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"cn: renamedSince",
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"sn: renamedSince");
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final String entryUUID = getEntryUUID(entry.getName());
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final String[] exported = exportedEntries();
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startImportInto(exported.length);
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replayMsg(new ModifyMsg(gen.newCSN(), DN.valueOf("cn=movedAway," + EXAMPLE_DN),
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generatemods("description", "replayed during the import"), entryUUID));
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finishImport(exported);
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// A change on an entry the import brought, replayed once the import is over.
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final DN importedDN = DN.valueOf(IMPORTED_ENTRY_DN);
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final CSN csn = gen.newCSN();
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replayMsg(new ModifyMsg(csn, importedDN,
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generatemods("description", "replayed after the import"), IMPORTED_ENTRY_UUID));
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assertThat(DirectoryServer.getEntry(importedDN).getAllAttributes("description"))
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.as("a change replayed after the import was not applied").isNotEmpty();
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assertTrue(domain.getServerState().cover(csn), "a change applied after the import was not"
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+ " recorded: the change given back during the import is still listed and holds the"
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+ " ServerState back");
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}
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/**
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* A total update this replica asked for owns the session from the request, not from the
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* first entry: the {@code InitializeTargetMsg} which answers the request arrives over
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* that session, and a restart made while the answer is on its way loses it.
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* <p>
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* The backend is live for the length of the request - nothing has been taken away yet -
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* so the change is attempted, every attempt ends on an entryUUID search which does not
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* run, and the exhaustion exit reports it: what is refused is the restart which would
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* have followed, and the retry warning which goes with it. The exporter then answers the
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* request, and its entries stream to their end over the session which was left alone.
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*/
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@Test(timeOut = 120_000)
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public void aRequestOnItsWayOwnsTheSessionTheAnswerArrivesOver() throws Exception
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{
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final Entry entry = TestCaseUtils.addEntry(
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"dn: cn=renamedSince," + EXAMPLE_DN,
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"objectClass: top",
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"objectClass: person",
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"cn: renamedSince",
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"sn: renamedSince");
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final String entryUUID = getEntryUUID(entry.getName());
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final String[] exported = exportedEntries();
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// The request is out, and the exporter holds it until the change below has been replayed.
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domain.initializeFromRemote(EXPORTER_ID, null);
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assertNotNull(waitForSpecificMsg(exporter, InitializeRequestMsg.class));
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final CSN csn = gen.newCSN();
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ShortCircuitPlugin.registerShortCircuit(
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OperationType.SEARCH, "PreParse", ResultCode.UNAVAILABLE.intValue());
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try
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{
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replayMsg(new ModifyMsg(csn, DN.valueOf("cn=movedAway," + EXAMPLE_DN),
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generatemods("description", "replayed while the request was on its way"), entryUUID));
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assertTrue(ShortCircuitPlugin.getShortCircuitCount(OperationType.SEARCH, "PreParse")
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>= LDAPReplicationDomain.IN_PLACE_REPLAY_ATTEMPTS,
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"every attempt in place must have made its search: the backend is live while the"
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+ " request is on its way, so nothing holds the replay off");
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}
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finally
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{
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ShortCircuitPlugin.deregisterShortCircuit(OperationType.SEARCH, "PreParse");
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}
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assertThat(errorLogRecordsOf(ERR_ERROR_REPLAYING_OPERATION.ordinal(), csn))
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.as("the attempts in place were spent, which the exhaustion exit reports").isNotEmpty();
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assertThat(errorLogRecordsOf(WARN_REPLAY_RETRYING_CHANGE.ordinal(), csn))
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.as("the change was asked for again, which restarts the session the answer to the"
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+ " request arrives over")
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.isEmpty();
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assertTrue(domain.isConnected(), "the session the request was made over was stopped");
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answerImportRequest(exported.length);
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finishImport(exported);
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for (String ldif : exported)
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{
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final DN dn = dnOf(ldif);
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assertTrue(entryExists(dn), "the import ended before " + dn
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+ " arrived: the answer to the request was lost with the session it was made over");
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}
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}
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/**
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* The changes a replay which is unwound had parked as waiting for another change are
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* released and nothing more while a total update owns the session (issue #954): no
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* session restart is asked for them - the one it would ask for is refused where it runs,
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* and the request would be spent on it - and they are neither reported as changes the
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* replication server sends again, which it does not before the import has replaced the
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* data, nor counted as processed. That is the road a change a stopping replay thread
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* abandons takes on this domain, and the give-back of the parked changes takes it too.
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* <p>
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* Pinned on the import road because it is the one road with an owner which a test holds
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* open for as long as it needs: the request is on its way until the exporter answers it,
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* and the backend is live meanwhile, so the change which is parked and the replay which
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* is unwound run as they would on any domain. The domain going away, or being disabled,
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* forgets its pending changes a moment after it takes the session and clears every
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* request and every count on its way, so a give-back on that road is a race with the
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* forgetting and leaves nothing to read.
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* <p>
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* The replay is unwound on the thread of this test - it applied its change, and the ack
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* of its delivery runs out of memory - so the parked change is this thread's to give
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* back, and the error which ends a replay thread is caught here instead.
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*/
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@Test(timeOut = 120_000)
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public void aParkedChangeGivenBackWhileTheRequestIsOnItsWayIsNotAskedForAgain() throws Exception
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{
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final Entry entry = TestCaseUtils.addEntry(
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"dn: cn=renamedSince," + EXAMPLE_DN,
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"objectClass: top",
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"objectClass: person",
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"cn: renamedSince",
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"sn: renamedSince");
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final String entryUUID = getEntryUUID(entry.getName());
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final String[] exported = exportedEntries();
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// The request is out, and the exporter holds it until the give-back below has run.
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domain.initializeFromRemote(EXPORTER_ID, null);
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assertNotNull(waitForSpecificMsg(exporter, InitializeRequestMsg.class));
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/*
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* The barrier: a change whose replay fails stays listed and uncommitted - the attempts
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* in place end on an entryUUID search which does not run, the way they do in the case
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* above - and stays among the changes the newer ones are checked against, so a change
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* which follows it on the same entry has to wait for it. The restart which would have
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* followed is refused, the total update owning the session, and the search is let
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* through again before anything below reads a monitor.
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*/
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final DN movedAway = DN.valueOf("cn=movedAway," + EXAMPLE_DN);
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final CSN failing = gen.newCSN();
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ShortCircuitPlugin.registerShortCircuit(
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OperationType.SEARCH, "PreParse", ResultCode.UNAVAILABLE.intValue());
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try
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{
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replayMsg(new ModifyMsg(failing, movedAway,
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generatemods("description", "the replay of this change fails"), entryUUID));
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}
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finally
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{
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ShortCircuitPlugin.deregisterShortCircuit(OperationType.SEARCH, "PreParse");
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}
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assertFalse(domain.getServerState().cover(failing),
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"the change whose replay fails must stay listed as one which is not in the data");
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// Parked as waiting for it by this thread, which owns it from here on.
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final CSN parked = gen.newCSN();
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replayMsg(new ModifyMsg(parked, movedAway,
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generatemods("description", "the change which was parked as a dependency"), entryUUID));
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assertEquals(getMonitorAttrValue(baseDN, "dependent-changes-size"), 1,
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"a change which waits for one that is not in the data must be parked");
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/*
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* The replay which is unwound while this thread still holds the parked change: its own
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* change is applied and committed, so the give-back on the way out finds the parked
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* change alone. The count is read once the parked change is listed, since a parked
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* change publishes no ack and is not counted until the delivery which replays it is.
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*/
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final long processed = getMonitorAttrValue(baseDN, "replayed-updates");
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final CSN unwound = gen.newCSN();
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try
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{
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replayMsg(new ModifyMsgWhoseAckRunsOutOfMemoryOnceApplied(unwound, entry.getName(),
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generatemods("description", "the replay of this change is unwound once it is applied"),
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entryUUID));
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Assert.fail("the replay was not unwound: the ack of the delivery must run out of memory");
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}
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catch (OutOfMemoryError unwinding)
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{
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// The error is the fixture's own, and this is the thread it would have ended.
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}
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assertEquals(getMonitorAttrValue(baseDN, "dependent-changes-size"), 0,
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"the change parked by the replay which was unwound must be given back");
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assertEquals(getMonitorAttrValue(baseDN, "replayed-updates"), processed,
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"a change released while a total update owns the session must not be counted as"
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+ " processed: no session sends it again before the import has replaced the data");
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assertThat(errorLogRecordsOf(NOTE_REPLAY_PARKED_CHANGE_GIVEN_BACK.ordinal(), parked))
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.as("the change was reported as one the replication server sends again, which it does"
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+ " not before the import has replaced the data")
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.isEmpty();
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assertTrue(domain.isConnected(), "the session the answer to the request arrives over was stopped");
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answerImportRequest(exported.length);
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finishImport(exported);
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for (String ldif : exported)
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{
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final DN dn = dnOf(ldif);
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assertTrue(entryExists(dn), "the import ended before " + dn
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+ " arrived: the answer to the request was lost with the session it was made over");
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}
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}
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/**
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* A session restart which stood while the import ran was asked for by a replay thread
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* for a change given back before the total update owned the session, and that change is
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* forgotten with the pending changes when the imported data replaces the ServerState:
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* the session started back at the end of the import asks for everything the imported
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* state does not cover. Run, the request would stop that session once for a delivery
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* which can not come. The request is made here by hand, in the place of one made
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* between a replay thread's read of the owner and the import claiming the session.
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* <p>
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* The restart is the state checkpointer's to run, within its first tick after the total
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* update has released the session, so the pin is that the failure it would meet is never
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* spent: a restart which ran would have spent it, and would have left the session it
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* stopped down.
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*/
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@Test(timeOut = 120_000)
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public void aRequestWhichStoodWhileTheImportRanIsNotRunOnceItIsOver() throws Exception
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{
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final String[] exported = exportedEntries();
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startImportInto(exported.length);
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domain.requestSessionRestart();
|
domain.failNextSessionRestarts(1);
|
try
|
{
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finishImport(exported);
|
|
// Two ticks of the checkpointer: a request standing when the import ends is run on the first.
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Thread.sleep(2000);
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assertEquals(domain.getSessionRestartFailuresLeft(), 1, "the request which stood while"
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+ " the import ran was run against the session started back at its end");
|
assertTrue(domain.isConnected(), "the session started back at the end of the import"
|
+ " was stopped for a request made before it");
|
}
|
finally
|
{
|
domain.failNextSessionRestarts(0);
|
}
|
}
|
|
/**
|
* A total update forgets the deliveries which were folded into no warning, along with
|
* the changes they were deliveries of (issue #942).
|
* <p>
|
* The changes listed as pending do not outlive the ServerState the import replaces, and
|
* the recovery from a failed replay goes with them - the session restart backoff, and the
|
* count the next warning about a change being asked for again says it stands for. The
|
* first warning over the imported data must not count the deliveries of a change which
|
* is not listed anymore.
|
* <p>
|
* Nothing sends a change of this test again - the exporter never had it - so the count
|
* is fed by two changes failing within one interval rather than by one change delivered
|
* twice: the first is warned about, the second is folded into no warning. The changes
|
* are deletes: a short circuit on the modifies would be tripped by the ServerState being
|
* saved to the base entry and by the import disabling the backend it replaces.
|
*/
|
@Test(timeOut = 120_000)
|
public void aWarningAfterTheImportDoesNotCountTheDeliveriesBefore() throws Exception
|
{
|
final Entry warnedAbout = TestCaseUtils.addEntry(
|
"dn: cn=warnedAbout," + EXAMPLE_DN,
|
"objectClass: top",
|
"objectClass: person",
|
"cn: warnedAbout",
|
"sn: warnedAbout");
|
final Entry folded = TestCaseUtils.addEntry(
|
"dn: cn=folded," + EXAMPLE_DN,
|
"objectClass: top",
|
"objectClass: person",
|
"cn: folded",
|
"sn: folded");
|
final String warnedAboutUUID = getEntryUUID(warnedAbout.getName());
|
final String foldedUUID = getEntryUUID(folded.getName());
|
final String[] exported = exportedEntries();
|
|
ShortCircuitPlugin.registerShortCircuit(
|
OperationType.DELETE, "PreParse", ResultCode.UNAVAILABLE.intValue());
|
try
|
{
|
replayMsg(new DeleteMsg(warnedAbout.getName(), gen.newCSN(), warnedAboutUUID));
|
replayMsg(new DeleteMsg(folded.getName(), gen.newCSN(), foldedUUID));
|
|
startImportInto(exported.length);
|
finishImport(exported);
|
|
/*
|
* Only the timestamp of the throttle is put back, so that the failure over the
|
* imported data is warned about straight away: the count is the domain's to keep or
|
* to forget.
|
*/
|
domain.resetReplayRetryWarningThrottle();
|
final CSN csn = gen.newCSN();
|
replayMsg(new DeleteMsg(DN.valueOf(IMPORTED_ENTRY_DN), csn, IMPORTED_ENTRY_UUID));
|
final List<String> warnings = errorLogRecordsOf(WARN_REPLAY_RETRYING_CHANGE.ordinal(), csn);
|
assertThat(warnings).as("the change which fails over the imported data must be warned about")
|
.isNotEmpty();
|
assertThat(warnings.get(0))
|
.as("the first warning after the import must not count the deliveries before it")
|
.contains(" 0 further deliveries");
|
}
|
finally
|
{
|
ShortCircuitPlugin.deregisterShortCircuit(OperationType.DELETE, "PreParse");
|
}
|
}
|
|
/**
|
* A session restart decided after the {@code InitializeTargetMsg} was taken off the session
|
* and before the import claimed its context must not have the import run over the session
|
* it stops (issue #1041).
|
* <p>
|
* The owner read of the restart and the claim of the listener share no lock: the restart
|
* reads no owner, stops the broker and waits for the listener thread to end - which is the
|
* thread about to run the import. Run over that broker, the import ends on the nothing
|
* which arrived - as a failed import since issue #1039, and as a finished one before it -
|
* over a suffix which has been replaced by it all the same. Here the listener is held
|
* before its claim, the restart is driven through the gap by a change whose attempts in
|
* place are spent and held between its decision and the stop, and the listener is released
|
* in between: the broker it finds is still up, so what refuses the import is the claim of
|
* the restart, and the refusal reaches the exporter over the session which is about to be
|
* stopped.
|
*/
|
@Test(timeOut = 120_000)
|
public void aRestartDecidedBeforeTheImportIsClaimedRefusesTheImport() throws Exception
|
{
|
final Entry entry = TestCaseUtils.addEntry(
|
"dn: cn=renamedSince," + EXAMPLE_DN,
|
"objectClass: top",
|
"objectClass: person",
|
"cn: renamedSince",
|
"sn: renamedSince");
|
final String entryUUID = getEntryUUID(entry.getName());
|
final int totalUpdatesStartedBefore =
|
errorLogRecordsOf(NOTE_FULL_UPDATE_ENGAGED_FROM_REMOTE_START.ordinal()).size();
|
final int totalUpdatesEndedBefore =
|
errorLogRecordsOf(NOTE_FULL_UPDATE_ENGAGED_FROM_REMOTE_END.ordinal()).size();
|
final int listenerDeathsBefore = listenerDeaths().size();
|
final int refusalsBefore = errorLogRecordsOf(ERR_INIT_REJECTED_SESSION_STOPPING.ordinal()).size();
|
|
// The listener thread has taken the InitializeTargetMsg off the session and is held
|
// before it claims the import; the restart is held after its decision, before the stop.
|
final CountDownLatch listenerHeld = new CountDownLatch(1);
|
final CountDownLatch releaseListener = new CountDownLatch(1);
|
final CountDownLatch stopHeld = new CountDownLatch(1);
|
final CountDownLatch releaseStop = new CountDownLatch(1);
|
domain.setImportClaimHook(() -> {
|
listenerHeld.countDown();
|
awaitUninterruptibly(releaseListener);
|
});
|
domain.setServiceStopHook(() -> {
|
stopHeld.countDown();
|
awaitUninterruptibly(releaseStop);
|
});
|
try
|
{
|
exporter.publish(new InitializeTargetMsg(
|
baseDN, EXPORTER_ID, DS_ID, EXPORTER_ID, exportedEntries().length, INIT_WINDOW));
|
assertTrue(listenerHeld.await(30, TimeUnit.SECONDS),
|
"the listener thread did not reach the claim of the import");
|
|
/*
|
* A change whose entryUUID search never runs spends its attempts in place, finds no
|
* owner and restarts the session. On a thread of its own: the restart is held before
|
* the stop, and then waits for the listener thread.
|
*/
|
final CSN csn = gen.newCSN();
|
final AtomicReference<Throwable> replayFailure = new AtomicReference<>();
|
final Thread replay = new Thread(() -> {
|
try
|
{
|
replayMsg(new ModifyMsg(csn, DN.valueOf("cn=movedAway," + EXAMPLE_DN),
|
generatemods("description", "replayed before the import was claimed"), entryUUID));
|
}
|
catch (Throwable t)
|
{
|
replayFailure.set(t);
|
}
|
}, "replay of " + csn);
|
ShortCircuitPlugin.registerShortCircuit(
|
OperationType.SEARCH, "PreParse", ResultCode.UNAVAILABLE.intValue());
|
try
|
{
|
replay.start();
|
assertTrue(stopHeld.await(30, TimeUnit.SECONDS),
|
"the failed replay did not decide to restart the session");
|
}
|
finally
|
{
|
ShortCircuitPlugin.deregisterShortCircuit(OperationType.SEARCH, "PreParse");
|
}
|
assertTrue(domain.isConnected(), "the session was stopped before the stop was held");
|
assertFalse(domain.ieRunning(), "the claim of the stop is visible as a running import");
|
/*
|
* A total update asked for here is refused against the claim of the stop, and the
|
* claim is left where it is: the road which fails to acquire a context of its own
|
* releases nothing.
|
*/
|
assertThatThrownBy(() -> domain.initializeFromRemote(EXPORTER_ID, null))
|
.as("a total update asked for while the session is being stopped was not refused")
|
.isInstanceOf(DirectoryException.class)
|
.hasMessageContaining(ERR_INIT_REJECTED_SESSION_STOPPING.get(baseDN, DS_ID).toString());
|
|
/*
|
* The import is claimed against a restart which is decided and not yet made. Decided
|
* either way before the stop is released: without the claim the import runs, and the
|
* exporter is then waited for over a socket which nothing bounds.
|
*/
|
releaseListener.countDown();
|
waitUntil(() -> errorLogRecordsOf(ERR_INIT_REJECTED_SESSION_STOPPING.ordinal()).size() > refusalsBefore
|
|| errorLogRecordsOf(NOTE_FULL_UPDATE_ENGAGED_FROM_REMOTE_START.ordinal()).size() > totalUpdatesStartedBefore,
|
"the listener neither refused nor started the total update");
|
assertThat(errorLogRecordsOf(NOTE_FULL_UPDATE_ENGAGED_FROM_REMOTE_START.ordinal()))
|
.as("a total update claimed against a restart which was decided was started")
|
.hasSize(totalUpdatesStartedBefore);
|
final ErrorMsg refusal = waitForSpecificMsg(exporter, ErrorMsg.class);
|
assertThat(refusal.getDetails().toString())
|
.as("the exporter was not told why the total update was refused")
|
.isEqualTo(ERR_INIT_REJECTED_SESSION_STOPPING.get(baseDN, DS_ID).toString());
|
|
/*
|
* An answer to a total update this replica asked for, which no context stands for - the
|
* request was abandoned as stalled (issue #861) - finds only the claim of the stop, and
|
* the claim is no context to import into: the answer is ignored. The total update
|
* another server starts after it is what shows that the listener is past it: refused
|
* here, against the same claim.
|
*/
|
final int refusalsOfTheFirst =
|
errorLogRecordsOf(ERR_INIT_REJECTED_SESSION_STOPPING.ordinal()).size();
|
exporter.publish(new InitializeTargetMsg(
|
baseDN, EXPORTER_ID, DS_ID, DS_ID, exportedEntries().length, INIT_WINDOW));
|
exporter.publish(new InitializeTargetMsg(
|
baseDN, EXPORTER_ID, DS_ID, EXPORTER_ID, exportedEntries().length, INIT_WINDOW));
|
waitUntil(() -> errorLogRecordsOf(ERR_INIT_REJECTED_SESSION_STOPPING.ordinal()).size() > refusalsOfTheFirst
|
|| errorLogRecordsOf(NOTE_FULL_UPDATE_ENGAGED_FROM_REMOTE_START.ordinal()).size() > totalUpdatesStartedBefore,
|
"the listener neither refused nor started the total update after the stale answer");
|
assertThat(errorLogRecordsOf(NOTE_FULL_UPDATE_ENGAGED_FROM_REMOTE_START.ordinal()))
|
.as("an answer no context stands for was imported into the claim of the stop")
|
.hasSize(totalUpdatesStartedBefore);
|
|
releaseStop.countDown();
|
replay.join(60_000);
|
assertFalse(replay.isAlive(), "the restart did not end: the listener thread it waits for is still there");
|
assertNull(replayFailure.get(), "the replay failed: " + replayFailure.get());
|
}
|
finally
|
{
|
releaseListener.countDown();
|
releaseStop.countDown();
|
domain.setImportClaimHook(null);
|
domain.setServiceStopHook(null);
|
}
|
|
waitUntil(domain::isConnected, "the session was not started back after the restart");
|
assertTrue(entryExists(entry.getName()), "the import ran over the session the restart"
|
+ " stopped: the suffix was replaced by the nothing which arrived");
|
// A total update which got past the claim ran over the broker the restart then stopped
|
// and ended on the nothing which arrived - as a failed import since issue #1039, and as
|
// a finished one before it; neither is a total update which never ran.
|
assertThat(errorLogRecordsOf(NOTE_FULL_UPDATE_ENGAGED_FROM_REMOTE_END.ordinal()))
|
.as("a total update which was refused was run")
|
.hasSize(totalUpdatesEndedBefore);
|
assertThat(listenerDeaths())
|
.as("the listener thread ended on an uncaught exception")
|
.hasSize(listenerDeathsBefore);
|
// Every record is written twice - the error log has two publishers in the tests.
|
assertThat(errorLogRecordsOf(ERR_INIT_REJECTED_SESSION_STOPPING.ordinal()))
|
.as("the refusal of the total update was not recorded on this server")
|
.hasSizeGreaterThan(refusalsBefore);
|
|
/*
|
* The claim of the stop was released with the stop: the next total update into this
|
* replica is claimed by the listener and runs to its end. Held, it would be invisible
|
* to every reader of the context and refuse every total update for the life of the
|
* domain.
|
*/
|
startImportInto(exportedEntries().length);
|
finishImport(exportedEntries());
|
assertThat(errorLogRecordsOf(NOTE_FULL_UPDATE_ENGAGED_FROM_REMOTE_END.ordinal()))
|
.as("the total update after the restart did not run to its end")
|
.hasSize(totalUpdatesEndedBefore + 2);
|
}
|
|
/**
|
* A domain disabled after the {@code InitializeTargetMsg} was taken off the session and
|
* before the import claimed its context must refuse the import as well.
|
* <p>
|
* Nothing claims against the listener here - the domain disabling itself stops the session
|
* whatever owns it - so what refuses the import is the listener reading, once its claim is
|
* made, that the broker it would stream over is stopping. Without that read the claim wins,
|
* and what runs next publishes the full update status over a session which is gone.
|
*/
|
@Test(timeOut = 120_000)
|
public void aDomainDisabledBeforeTheImportIsClaimedRefusesTheImport() throws Exception
|
{
|
final Entry entry = TestCaseUtils.addEntry(
|
"dn: cn=survivor," + EXAMPLE_DN,
|
"objectClass: top",
|
"objectClass: person",
|
"cn: survivor",
|
"sn: survivor");
|
final int totalUpdatesStartedBefore =
|
errorLogRecordsOf(NOTE_FULL_UPDATE_ENGAGED_FROM_REMOTE_START.ordinal()).size();
|
final int listenerDeathsBefore = listenerDeaths().size();
|
final int refusalsBefore = errorLogRecordsOf(ERR_INIT_REJECTED_SESSION_STOPPING.ordinal()).size();
|
|
final CountDownLatch listenerHeld = new CountDownLatch(1);
|
final CountDownLatch releaseListener = new CountDownLatch(1);
|
domain.setImportClaimHook(() -> {
|
listenerHeld.countDown();
|
awaitUninterruptibly(releaseListener);
|
});
|
try
|
{
|
exporter.publish(new InitializeTargetMsg(
|
baseDN, EXPORTER_ID, DS_ID, EXPORTER_ID, exportedEntries().length, INIT_WINDOW));
|
assertTrue(listenerHeld.await(30, TimeUnit.SECONDS),
|
"the listener thread did not reach the claim of the import");
|
|
// On a thread of its own: disabling the domain waits for the listener thread.
|
final Thread disable = new Thread(domain::disable, "disable of " + EXAMPLE_DN);
|
disable.start();
|
waitUntil(() -> !domain.isConnected(), "disabling the domain did not stop the session");
|
releaseListener.countDown();
|
disable.join(60_000);
|
assertFalse(disable.isAlive(), "disabling the domain did not end: the listener thread"
|
+ " it waits for is still there");
|
}
|
finally
|
{
|
releaseListener.countDown();
|
domain.setImportClaimHook(null);
|
}
|
domain.enable();
|
waitUntil(domain::isConnected, "the session was not started back by enable()");
|
assertFalse(domain.ieRunning(), "the refused import left its context claimed");
|
|
assertTrue(entryExists(entry.getName()), "the import ran over the session the disable"
|
+ " stopped: the suffix was replaced by the nothing which arrived");
|
assertThat(errorLogRecordsOf(NOTE_FULL_UPDATE_ENGAGED_FROM_REMOTE_START.ordinal()))
|
.as("a total update claimed against a session which is being stopped was started")
|
.hasSize(totalUpdatesStartedBefore);
|
assertThat(listenerDeaths())
|
.as("the listener thread ended on an uncaught exception")
|
.hasSize(listenerDeathsBefore);
|
// Every record is written twice - the error log has two publishers in the tests.
|
assertThat(errorLogRecordsOf(ERR_INIT_REJECTED_SESSION_STOPPING.ordinal()))
|
.as("the refusal of the total update was not recorded on this server")
|
.hasSizeGreaterThan(refusalsBefore);
|
}
|
|
/**
|
* A domain disabled after the answer to a total update this replica asked for was taken off
|
* the session, and before the import started, must refuse the import too.
|
* <p>
|
* The context is the one the request claimed, so there is nothing to claim against: what
|
* refuses the import is the same read of the broker as for a total update another server
|
* started. Without it the import runs over the session the disable stopped, and replaces the
|
* suffix with the nothing which arrived.
|
*/
|
@Test(timeOut = 120_000)
|
public void aDomainDisabledBeforeTheImportItAskedForStartsRefusesTheImport() throws Exception
|
{
|
final Entry entry = TestCaseUtils.addEntry(
|
"dn: cn=survivor," + EXAMPLE_DN,
|
"objectClass: top",
|
"objectClass: person",
|
"cn: survivor",
|
"sn: survivor");
|
final int totalUpdatesStartedBefore =
|
errorLogRecordsOf(NOTE_FULL_UPDATE_ENGAGED_FROM_REMOTE_START.ordinal()).size();
|
final int listenerDeathsBefore = listenerDeaths().size();
|
|
domain.initializeFromRemote(EXPORTER_ID, null);
|
assertNotNull(waitForSpecificMsg(exporter, InitializeRequestMsg.class));
|
|
final CountDownLatch listenerHeld = new CountDownLatch(1);
|
final CountDownLatch releaseListener = new CountDownLatch(1);
|
domain.setImportClaimHook(() -> {
|
listenerHeld.countDown();
|
awaitUninterruptibly(releaseListener);
|
});
|
try
|
{
|
exporter.publish(new InitializeTargetMsg(
|
baseDN, EXPORTER_ID, DS_ID, DS_ID, exportedEntries().length, INIT_WINDOW));
|
assertTrue(listenerHeld.await(30, TimeUnit.SECONDS),
|
"the listener thread did not reach the start of the import");
|
|
// On a thread of its own: disabling the domain waits for the listener thread.
|
final Thread disable = new Thread(domain::disable, "disable of " + EXAMPLE_DN);
|
disable.start();
|
waitUntil(() -> !domain.isConnected(), "disabling the domain did not stop the session");
|
releaseListener.countDown();
|
disable.join(60_000);
|
assertFalse(disable.isAlive(), "disabling the domain did not end: the listener thread"
|
+ " it waits for is still there");
|
}
|
finally
|
{
|
releaseListener.countDown();
|
domain.setImportClaimHook(null);
|
}
|
domain.enable();
|
waitUntil(domain::isConnected, "the session was not started back by enable()");
|
assertFalse(domain.ieRunning(), "the refused import left the context of its request claimed");
|
|
assertTrue(entryExists(entry.getName()), "the import ran over the session the disable"
|
+ " stopped: the suffix was replaced by the nothing which arrived");
|
assertThat(errorLogRecordsOf(NOTE_FULL_UPDATE_ENGAGED_FROM_REMOTE_START.ordinal()))
|
.as("a total update answered over a session which is being stopped was started")
|
.hasSize(totalUpdatesStartedBefore);
|
assertThat(listenerDeaths())
|
.as("the listener thread ended on an uncaught exception")
|
.hasSize(listenerDeathsBefore);
|
}
|
|
/**
|
* A session restart decided while a total update out of this replica is running stops the
|
* session that export streams over (issue #1041).
|
* <p>
|
* What the restart must leave alone is a total update into this replica: the data it is
|
* about to replace is read over the session, and the import is the thread the stop waits
|
* for. An export is not that: it streams out of a backend nothing is taking away, on a
|
* thread of its own, and a session stopped under it is the cut it reports to whoever asked
|
* for the total update - the same cut every other stop of the session is. The claim the
|
* restart makes for the import is not made here, and the session is stopped as it was
|
* before the claim.
|
* <p>
|
* The export holds the context by standing where it waits for its target to report the
|
* start of the total update: the target is a broker of this test, and reports nothing.
|
*/
|
@Test(timeOut = 120_000)
|
public void aRestartDecidedWhileAnExportRunsStopsTheSessionItStreamsOver() throws Exception
|
{
|
final Entry entry = TestCaseUtils.addEntry(
|
"dn: cn=renamedSince," + EXAMPLE_DN,
|
"objectClass: top",
|
"objectClass: person",
|
"cn: renamedSince",
|
"sn: renamedSince");
|
final String entryUUID = getEntryUUID(entry.getName());
|
waitUntil(() -> domain.getReplicaInfos().containsKey(EXPORTER_ID),
|
"the exporter is not in the replicas of the domain: nothing to export into");
|
|
final AtomicReference<Throwable> exportFailure = new AtomicReference<>();
|
final Thread export = new Thread(() -> {
|
try
|
{
|
domain.initializeRemote(EXPORTER_ID, null);
|
}
|
catch (Throwable t)
|
{
|
exportFailure.set(t);
|
}
|
}, "export of " + EXAMPLE_DN);
|
|
// The restart is held after its decision, before the stop: what the case reads is the
|
// decision the export was found by, not the session which is down a moment later.
|
final CountDownLatch stopHeld = new CountDownLatch(1);
|
final CountDownLatch releaseStop = new CountDownLatch(1);
|
domain.setServiceStopHook(() -> {
|
stopHeld.countDown();
|
awaitUninterruptibly(releaseStop);
|
});
|
final CSN csn = gen.newCSN();
|
final AtomicReference<Throwable> replayFailure = new AtomicReference<>();
|
final Thread replay = new Thread(() -> {
|
try
|
{
|
replayMsg(new ModifyMsg(csn, DN.valueOf("cn=movedAway," + EXAMPLE_DN),
|
generatemods("description", "replayed while the export was running"), entryUUID));
|
}
|
catch (Throwable t)
|
{
|
replayFailure.set(t);
|
}
|
}, "replay of " + csn);
|
try
|
{
|
export.start();
|
waitUntil(() -> domain.ieRunning() || exportFailure.get() != null,
|
"the export did not claim the import context");
|
assertNull(exportFailure.get(),
|
"the export failed before it claimed the context: " + exportFailure.get());
|
|
// A change whose entryUUID search never runs spends its attempts in place and asks
|
// for the session to be restarted, the way it does in the case above.
|
ShortCircuitPlugin.registerShortCircuit(
|
OperationType.SEARCH, "PreParse", ResultCode.UNAVAILABLE.intValue());
|
try
|
{
|
replay.start();
|
assertTrue(stopHeld.await(30, TimeUnit.SECONDS),
|
"the restart left the session to the export: an export is not the owner a total"
|
+ " update into this replica is");
|
}
|
finally
|
{
|
ShortCircuitPlugin.deregisterShortCircuit(OperationType.SEARCH, "PreParse");
|
}
|
assertTrue(domain.ieRunning(), "the export ended before the restart was decided");
|
}
|
finally
|
{
|
releaseStop.countDown();
|
domain.setServiceStopHook(null);
|
}
|
|
replay.join(60_000);
|
assertFalse(replay.isAlive(), "the restart did not end");
|
assertNull(replayFailure.get(), "the replay failed: " + replayFailure.get());
|
export.join(60_000);
|
assertFalse(export.isAlive(), "the export did not end once the session it streams over"
|
+ " was stopped");
|
assertThat(exportFailure.get())
|
.as("the export was not told that the session it streams over was cut")
|
.isInstanceOf(DirectoryException.class);
|
waitUntil(domain::isConnected, "the session was not started back after the restart");
|
assertFalse(domain.ieRunning(), "the export which was cut left its context claimed");
|
}
|
|
/**
|
* Has the exporter start a total update into this replica, and returns once the backend
|
* of the domain is deregistered for it: from then on the import is reading the session,
|
* and a change replayed here is replayed into no backend.
|
*/
|
private void startImportInto(int entryCount) throws Exception
|
{
|
exporter.publish(new InitializeTargetMsg(
|
baseDN, EXPORTER_ID, DS_ID, EXPORTER_ID, entryCount, INIT_WINDOW));
|
final long deadline = System.currentTimeMillis() + 30_000;
|
while (getServerContext().getBackendConfigManager().findLocalBackendForEntry(baseDN) != null)
|
{
|
assertTrue(System.currentTimeMillis() < deadline,
|
"the import did not deregister the backend of the domain");
|
Thread.sleep(20);
|
}
|
}
|
|
/**
|
* Has the exporter answer the total update this replica asked for: the requestor of the
|
* {@code InitializeTargetMsg} is this replica, so the import runs in the context the
|
* request acquired.
|
*/
|
private void answerImportRequest(int entryCount) throws Exception
|
{
|
exporter.publish(new InitializeTargetMsg(
|
baseDN, EXPORTER_ID, DS_ID, DS_ID, entryCount, INIT_WINDOW));
|
}
|
|
/** Has the exporter send the entries of the total update, and waits for the import to end. */
|
private void finishImport(String... ldifEntries) throws Exception
|
{
|
int msgId = 0;
|
for (String ldif : ldifEntries)
|
{
|
exporter.publish(new EntryMsg(EXPORTER_ID, DS_ID, ldif.getBytes(UTF_8), ++msgId));
|
}
|
exporter.publish(new DoneMsg(EXPORTER_ID, DS_ID));
|
final long deadline = System.currentTimeMillis() + 60_000;
|
while (domain.ieRunning())
|
{
|
assertTrue(System.currentTimeMillis() < deadline, "the import did not end");
|
Thread.sleep(50);
|
}
|
}
|
|
/** The data of the exporter: the base entry and two entries below it. */
|
private static String[] exportedEntries()
|
{
|
return new String[] {
|
"dn: " + EXAMPLE_DN + "\n"
|
+ "objectClass: top\n"
|
+ "objectClass: domain\n"
|
+ "dc: example\n"
|
+ "entryUUID: 21111111-1111-1111-1111-111111111111\n"
|
+ "\n",
|
"dn: ou=People," + EXAMPLE_DN + "\n"
|
+ "objectClass: top\n"
|
+ "objectClass: organizationalUnit\n"
|
+ "ou: People\n"
|
+ "entryUUID: 21111111-1111-1111-1111-111111111112\n"
|
+ "\n",
|
"dn: " + IMPORTED_ENTRY_DN + "\n"
|
+ "objectClass: top\n"
|
+ "objectClass: person\n"
|
+ "cn: imported\n"
|
+ "sn: imported\n"
|
+ "entryUUID: " + IMPORTED_ENTRY_UUID + "\n"
|
+ "\n",
|
};
|
}
|
|
private static DN dnOf(String ldif)
|
{
|
return DN.valueOf(ldif.substring("dn: ".length(), ldif.indexOf('\n')));
|
}
|
|
/** The records of the error log which carry the provided message id and the provided CSN. */
|
private static List<String> errorLogRecordsOf(int msgId, CSN csn)
|
{
|
final List<String> records = new ArrayList<>();
|
for (String record : errorLogRecordsOf(msgId))
|
{
|
if (record.contains(csn.toString()))
|
{
|
records.add(record);
|
}
|
}
|
return records;
|
}
|
|
/** The records of the error log which carry the provided message id. */
|
private static List<String> errorLogRecordsOf(int msgId)
|
{
|
final List<String> records = new ArrayList<>();
|
for (String record : TestCaseUtils.ERROR_TEXT_WRITER.getMessages())
|
{
|
if (record.contains("msgID=" + msgId))
|
{
|
records.add(record);
|
}
|
}
|
return records;
|
}
|
|
/** The records of the error log which report the listener thread of the domain ending abnormally. */
|
private static List<String> listenerDeaths()
|
{
|
final List<String> records = new ArrayList<>();
|
for (String record : errorLogRecordsOf(ERR_UNCAUGHT_THREAD_EXCEPTION.ordinal()))
|
{
|
if (record.contains("listener for domain \"" + EXAMPLE_DN + "\""))
|
{
|
records.add(record);
|
}
|
}
|
return records;
|
}
|
|
private static void waitUntil(BooleanSupplier condition, String failure) throws InterruptedException
|
{
|
final long deadline = System.currentTimeMillis() + 30_000;
|
while (!condition.getAsBoolean())
|
{
|
assertTrue(System.currentTimeMillis() < deadline, failure);
|
Thread.sleep(20);
|
}
|
}
|
|
private static void awaitUninterruptibly(CountDownLatch latch)
|
{
|
boolean interrupted = false;
|
while (true)
|
{
|
try
|
{
|
latch.await();
|
break;
|
}
|
catch (InterruptedException e)
|
{
|
interrupted = true;
|
}
|
}
|
if (interrupted)
|
{
|
Thread.currentThread().interrupt();
|
}
|
}
|
|
private void replayMsg(UpdateMsg updateMsg) throws InterruptedException
|
{
|
domain.processUpdate(updateMsg);
|
final LDAPUpdateMsg ldapUpdate = queue.take().getUpdateMessage();
|
domain.markInProgress(ldapUpdate);
|
domain.replay(ldapUpdate, SHUTDOWN);
|
}
|
}
|
