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wangxiaoqing commented on AMQ-7452: ----------------------------------- I don't know how to reproduce this problem. but it's happen so ofen and only happens in one of our environments, and I'm confused I suspect that there are too many connections or too many messages in ActiveMQ. > java.lang.IllegalStateException: Timer already cancelled. > --------------------------------------------------------- > > Key: AMQ-7452 > URL: https://issues.apache.org/jira/browse/AMQ-7452 > Project: ActiveMQ > Issue Type: Bug > Components: Broker > Affects Versions: 5.15.3 > Reporter: wangxiaoqing > Priority: Blocker > Attachments: activemq.xml, docker-mq.yaml > > > 2020-03-24 12:54:47,990 | ERROR | Could not accept connection from > tcp://10.0.1.5:41212 : {} | org.apache.activemq.broker.TransportConnector | > ActiveMQ BrokerService[localhost] Task-174422020-03-24 12:54:47,990 | ERROR | > Could not accept connection from tcp://10.0.1.5:41212 : {} | > org.apache.activemq.broker.TransportConnector | ActiveMQ > BrokerService[localhost] Task-17442java.lang.IllegalStateException: Timer > already cancelled. at java.util.Timer.sched(Timer.java:397)[:1.8.0_191] at > java.util.Timer.schedule(Timer.java:193)[:1.8.0_191] at > org.apache.activemq.transport.AbstractInactivityMonitor.startConnectCheckTask(AbstractInactivityMonitor.java:425)[activemq-client-5.15.3.jar:5.15.3] > at > org.apache.activemq.transport.AbstractInactivityMonitor.startConnectCheckTask(AbstractInactivityMonitor.java:400)[activemq-client-5.15.3.jar:5.15.3] > at > org.apache.activemq.transport.InactivityMonitor.start(InactivityMonitor.java:50)[activemq-client-5.15.3.jar:5.15.3] > at > org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:64)[activemq-client-5.15.3.jar:5.15.3] > at > org.apache.activemq.transport.WireFormatNegotiator.start(WireFormatNegotiator.java:72)[activemq-client-5.15.3.jar:5.15.3] > at > org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:64)[activemq-client-5.15.3.jar:5.15.3] > at > org.apache.activemq.broker.TransportConnection.start(TransportConnection.java:1066)[activemq-broker-5.15.3.jar:5.15.3] > at > org.apache.activemq.broker.TransportConnector$1$1.run(TransportConnector.java:218)[activemq-broker-5.15.3.jar:5.15.3] > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)[:1.8.0_191] > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)[:1.8.0_191] > at java.lang.Thread.run(Thread.java:748)[:1.8.0_191] -- This message was sent by Atlassian Jira (v8.3.4#803005)