Fix OPENDJ-401: Replication fails with Java 7.

Matthew Swift

11.47.2012 057a5631ed5dea85a26c26ada109338029a8c20f

 opends/src/server/org/opends/server/replication/service/ReplicationBroker.java

@@ -23,7 +23,7 @@
 *
 *
 *      Copyright 2006-2010 Sun Microsystems, Inc.
 *      Portions Copyright 2011 ForgeRock AS
 *      Portions Copyright 2011-2012 ForgeRock AS
 */
package org.opends.server.replication.service;

@@ -953,7 +953,23 @@
                connectionError = false;
                if (sendWindow != null)
                {
                  sendWindow.release(Integer.MAX_VALUE);
                  /*
                   * Fix (hack) for OPENDJ-401: we want to ensure that no
                   * threads holding this semaphore will get blocked when they
                   * acquire it. However, we also need to make sure that we
                   * don't overflow the semaphore by releasing too many permits.
                   */
                  final int MAX_PERMITS = (Integer.MAX_VALUE >>> 2);
                  if (sendWindow.availablePermits() < MAX_PERMITS)
                  {
                    /*
                     * At least 2^29 acquisitions would need to occur for this
                     * to be insufficient. In addition, at least 2^30 releases
                     * would need to occur for this to potentially overflow.
                     * Hopefully this is unlikely to happen.
                     */
                    sendWindow.release(MAX_PERMITS);
                  }
                }
                sendWindow = new Semaphore(maxSendWindow);
                rcvWindow = maxRcvWindow;