[jira] [Created] (ARTEMIS-502) AMQ224044, error acknowledging message: java.lang.NullPointerException, can happen sometimes during load

["Ingo Weiss (JIRA)" <ji...@apache.org>]

Ingo Weiss created ARTEMIS-502:
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             Summary: AMQ224044, error acknowledging message: java.lang.NullPointerException, can happen sometimes during load
                 Key: ARTEMIS-502
                 URL: https://issues.apache.org/jira/browse/ARTEMIS-502
             Project: ActiveMQ Artemis
          Issue Type: Bug
          Components: Broker
    Affects Versions: 1.2.0, 1.1.0, 1.0.0, 1.3.0
            Reporter: Ingo Weiss


When under heavy load, the broker can sometimes log this NPE:
{code}
04:53:44,897 ERROR [org.apache.activemq.artemis.core.server] (default I/O-4) AMQ224044: error acknowledging message: java.lang.NullPointerException
	at org.apache.activemq.artemis.core.server.impl.ServerConsumerImpl.removeReferenceByID(ServerConsumerImpl.java:796)
	at org.apache.activemq.artemis.core.server.impl.ServerConsumerImpl.individualAcknowledge(ServerConsumerImpl.java:726)
	at org.apache.activemq.artemis.core.server.impl.ServerSessionImpl.individualAcknowledge(ServerSessionImpl.java:738)
	at org.apache.activemq.artemis.core.protocol.core.ServerSessionPacketHandler.handlePacket(ServerSessionPacketHandler.java:408)
	at org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl.handlePacket(ChannelImpl.java:567)
	at org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl.doBufferReceived(RemotingConnectionImpl.java:349)
	at org.apache.activemq.artemis.core.protocol.core.impl.RemotingConnectionImpl.bufferReceived(RemotingConnectionImpl.java:331)
	at org.apache.activemq.artemis.core.remoting.server.impl.RemotingServiceImpl$DelegatingBufferHandler.bufferReceived(RemotingServiceImpl.java:605)
	at org.apache.activemq.artemis.core.remoting.impl.netty.ActiveMQChannelHandler.channelRead(ActiveMQChannelHandler.java:68)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:308)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:294)
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:265)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:308)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:294)
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:846)
	at org.xnio.netty.transport.AbstractXnioSocketChannel$ReadListener.handleEvent(AbstractXnioSocketChannel.java:435)
	at org.xnio.netty.transport.AbstractXnioSocketChannel$ReadListener.handleEvent(AbstractXnioSocketChannel.java:371)
	at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92) [xnio-api-3.3.4.Final-redhat-1.jar:3.3.4.Final-redhat-1]
	at org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler.readReady(ReadReadyHandler.java:66) [xnio-api-3.3.4.Final-redhat-1.jar:3.3.4.Final-redhat-1]
	at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:88) [xnio-nio-3.3.4.Final-redhat-1.jar:3.3.4.Final-redhat-1]
	at org.xnio.nio.WorkerThread.run(WorkerThread.java:559) [xnio-nio-3.3.4.Final-redhat-1.jar:3.3.4.Final-redhat-1]
{code}



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