Consistency called full gc

Hello

I saw in our environment that in certain circumstances, coherence relies on as a full gc. Why do we do this? Is it possible to avoid it?



Kind regards
Mikel.


INFO | JVM 1 | 2011-04-11 16:42:52 | Thread [PacketPublisher, 6, Cluster]
INFO | JVM 1 | 2011-04-11 16:42:52 |      java.lang.Runtime.gc (Native Method)
INFO | JVM 1 | 2011-04-11 16:42:52 |      com.tangosol.coherence.component.net.Cluster$ SocketManager.forceGC (Cluster.CDB:3)
INFO | JVM 1 | 2011-04-11 16:42:52 |      com.tangosol.coherence.component.net.Cluster$ SocketManager.refreshSockets (Cluster.CDB:68)
INFO | JVM 1 | 2011-04-11 16:42:52 |      com.tangosol.coherence.component.net.Cluster$ SocketManager$ InboundUnicastUdpSocket.onException (Cluster.CDB:7)
INFO | JVM 1 | 2011-04-11 16:42:52 |      com.tangosol.coherence.component.net.socket.UdpSocket.onSendException(UdpSocket.CDB:1)
INFO | JVM 1 | 2011-04-11 16:42:52 |      com.tangosol.coherence.component.net.socket.UdpSocket.send(UdpSocket.CDB:60)
INFO | JVM 1 | 2011-04-11 16:42:52 |      com.tangosol.coherence.component.net.udpPacket.OutgoingUdpPacket.send(OutgoingUdpPacket.CDB:10)
INFO | JVM 1 | 2011-04-11 16:42:52 |      com.tangosol.coherence.component.util.daemon.queueProcessor.packetProcessor.PacketSpeaker$ BundlingQueue.flush (PacketSpeaker.CDB:62)
INFO | JVM 1 | 2011-04-11 16:42:52 |      com.tangosol.coherence.component.util.queue.ConcurrentQueue.checkFlush(ConcurrentQueue.CDB:20)
INFO | JVM 1 | 2011-04-11 16:42:52 |      com.tangosol.coherence.component.util.queue.ConcurrentQueue.onAddElement(ConcurrentQueue.CDB:1)
INFO | JVM 1 | 2011-04-11 16:42:52 |      com.tangosol.coherence.component.util.queue.concurrentQueue.BalancedQueue.add(BalancedQueue.CDB:5)
INFO | JVM 1 | 2011-04-11 16:42:52 |      com.tangosol.coherence.component.util.daemon.queueProcessor.packetProcessor.PacketSpeaker$ BundlingQueue.add (PacketSpeaker.CDB:35)
INFO | JVM 1 | 2011-04-11 16:42:52 |      com.tangosol.coherence.component.util.daemon.queueProcessor.packetProcessor.PacketPublisher.onPacket(PacketPublisher.CDB:102)
INFO | JVM 1 | 2011-04-11 16:42:52 |      com.tangosol.coherence.component.util.daemon.queueProcessor.packetProcessor.PacketPublisher.onNotify(PacketPublisher.CDB:44)
INFO | JVM 1 | 2011-04-11 16:42:52 |      com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:42)
INFO | JVM 1 | 2011-04-11 16:42:52 |      java.lang.Thread.run(Thread.java:619)
INFO | JVM 1 | 2011-04-11 16:42:52 |

Hi Mikel,

Consistency has a few places where we make explicit calls to System.GC() to take into account the known JVM bugs which would result in a memory leak or resource if a GC is not made. One highlight is called when we drop a socket, which should be an extremely rare event. You can optionally ask the JVM to ignore the explicit requests of GC by adding - XX:-DisableExplicitGC at the command line.

Thank you

Mark
The Oracle coherence

Tags: Fusion Middleware

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