Sometimes we see the following exception in activemq log: javax.jms.InvalidClientIDException: Broker: jdbcBroker - Client: NC_localhost_outbound already connected from /91.87.217.72:5814 at org.apache.activemq.broker.region.RegionBroker.addConnection(RegionBroker.java:243) at org.apache.activemq.broker.BrokerFilter.addConnection(BrokerFilter.java:85) at org.apache.activemq.advisory.AdvisoryBroker.addConnection(AdvisoryBroker.java:66) at org.apache.activemq.broker.BrokerFilter.addConnection(BrokerFilter.java:85) at org.apache.activemq.broker.BrokerFilter.addConnection(BrokerFilter.java:85) at org.apache.activemq.broker.MutableBrokerFilter.addConnection(MutableBrokerFilter.java:91) at org.apache.activemq.broker.TransportConnection.processAddConnection(TransportConnection.java:692) at org.apache.activemq.broker.jmx.ManagedTransportConnection.processAddConnection(ManagedTransportConnection.java:83) at org.apache.activemq.command.ConnectionInfo.visit(ConnectionInfo.java:137) at org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:306) at org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:179) at org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:69) at org.apache.activemq.transport.WireFormatNegotiator.onCommand(WireFormatNegotiator.java:113) at org.apache.activemq.transport.InactivityMonitor.onCommand(InactivityMonitor.java:227) at org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:83) at org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:220) at org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:202) at java.lang.Thread.run(Thread.java:662) 2011-04-14 04:43:04,680 | WARN | Async error occurred: java.lang.NullPointerException | org.apache.activemq.broker.TransportConnection.Service | ActiveMQ Transport: tcp:///92.88.218.68:10333 java.lang.NullPointerException at org.apache.activemq.broker.TransportConnection.processAddProducer(TransportConnection.java:500) at org.apache.activemq.command.ProducerInfo.visit(ProducerInfo.java:105) at org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:306) at org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:179) at org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:69) at org.apache.activemq.transport.WireFormatNegotiator.onCommand(WireFormatNegotiator.java:113) at org.apache.activemq.transport.InactivityMonitor.onCommand(InactivityMonitor.java:227) at org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:83) at org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:220) at org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:202) at java.lang.Thread.run(Thread.java:662) 2011-04-14 04:43:04,681 | WARN | Async error occurred: java.lang.NullPointerException | org.apache.activemq.broker.TransportConnection.Service | ActiveMQ Transport: tcp:///92.88.218.68:10333 java.lang.NullPointerException at org.apache.activemq.broker.TransportConnection.processAddConsumer(TransportConnection.java:539) at org.apache.activemq.command.ConsumerInfo.visit(ConsumerInfo.java:349) at org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:306) at org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:179) at org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:69) at org.apache.activemq.transport.WireFormatNegotiator.onCommand(WireFormatNegotiator.java:113) at org.apache.activemq.transport.InactivityMonitor.onCommand(InactivityMonitor.java:227) at org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:83) at org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:220) at org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:202) at java.lang.Thread.run(Thread.java:662)
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