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  1. AMQ Broker
  2. ENTMQBR-1995

Enabling TRACE-level logging in the broker leads to ConcurrentModificationException and failed operations

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Details

    • Bug
    • Resolution: Done
    • Major
    • AMQ 7.2.2.GA
    • AMQ 7.2.0.GA
    • broker-core
    • None
    • Release Notes
    • Hide
      In previous releases, multiple threads could concurrently modify a message's properties. This resulted in WARN messages in the log when TRACE-level logging was enabled. Now, concurrent access to message properties is done safely and the WARN messages in the log related to this issue no longer occur.
      Show
      In previous releases, multiple threads could concurrently modify a message's properties. This resulted in WARN messages in the log when TRACE-level logging was enabled. Now, concurrent access to message properties is done safely and the WARN messages in the log related to this issue no longer occur.
    • Documented as Resolved Issue
    • AMQ Broker 1839

    Description

      Enabling TRACE-level logging in the broker leads periodically to the following exception being thrown, and messaging operations fail. It is therefore impossible to collect diagnostics at this level in a production environment.

      2018-09-20 11:23:52,493 WARN  [org.apache.activemq.artemis.core.message.impl.CoreMessage] Error creating String for message: : java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextNode(HashMap.java:1437) [rt.jar:1.8.0_102]
	at java.util.HashMap$EntryIterator.next(HashMap.java:1471) [rt.jar:1.8.0_102]
	at java.util.HashMap$EntryIterator.next(HashMap.java:1469) [rt.jar:1.8.0_102]
	at org.apache.activemq.artemis.utils.collections.TypedProperties.toString(TypedProperties.java:464) [artemis-commons-2.6.1.amq-720008.jar:2.6.1.amq-720008]
	at java.lang.String.valueOf(String.java:2994) [rt.jar:1.8.0_102]
	at java.lang.StringBuilder.append(StringBuilder.java:131) [rt.jar:1.8.0_102]
	at org.apache.activemq.artemis.core.message.impl.CoreMessage.toString(CoreMessage.java:1200) [artemis-core-client-2.6.1.amq-720008.jar:2.6.1.amq-720008]
	at java.lang.String.valueOf(String.java:2994) [rt.jar:1.8.0_102]
	at java.lang.StringBuilder.append(StringBuilder.java:131) [rt.jar:1.8.0_102]
	at org.apache.activemq.artemis.core.protocol.core.impl.wireformat.MessagePacket.getParentString(MessagePacket.java:39) [artemis-core-client-2.6.1.amq-720008.jar:2.6.1.amq-720008]
	at org.apache.activemq.artemis.core.protocol.core.impl.wireformat.SessionReceiveMessage.toString(SessionReceiveMessage.java:95) [artemis-core-client-2.6.1.amq-720008.jar:2.6.1.amq-720008]
	at java.lang.String.valueOf(String.java:2994) [rt.jar:1.8.0_102]
	at java.lang.StringBuilder.append(StringBuilder.java:131) [rt.jar:1.8.0_102]
	at org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl.send(ChannelImpl.java:274) [artemis-core-client-2.6.1.amq-720008.jar:2.6.1.amq-720008]
	at org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl.sendBatched(ChannelImpl.java:239) [artemis-core-client-2.6.1.amq-720008.jar:2.6.1.amq-720008]
	at org.apache.activemq.artemis.core.protocol.core.impl.CoreSessionCallback.sendMessage(CoreSessionCallback.java:128) [artemis-server-2.6.1.amq-720008.jar:2.6.1.amq-720008]
	at org.apache.activemq.artemis.core.server.impl.ServerConsumerImpl.deliverStandardMessage(ServerConsumerImpl.java:1106) [artemis-server-2.6.1.amq-720008.jar:2.6.1.amq-720008]
	at org.apache.activemq.artemis.core.server.impl.ServerConsumerImpl.proceedDeliver(ServerConsumerImpl.java:464) [artemis-server-2.6.1.amq-720008.jar:2.6.1.amq-720008]
	at org.apache.activemq.artemis.core.server.impl.QueueImpl.proceedDeliver(QueueImpl.java:2938) [artemis-server-2.6.1.amq-720008.jar:2.6.1.amq-720008]
	at org.apache.activemq.artemis.core.server.impl.QueueImpl.deliver(QueueImpl.java:2406) [artemis-server-2.6.1.amq-720008.jar:2.6.1.amq-720008]
	at org.apache.activemq.artemis.core.server.impl.QueueImpl.access$2000(QueueImpl.java:107) [artemis-server-2.6.1.amq-720008.jar:2.6.1.amq-720008]
	at org.apache.activemq.artemis.core.server.impl.QueueImpl$DeliverRunner.run(QueueImpl.java:3211) [artemis-server-2.6.1.amq-720008.jar:2.6.1.amq-720008]
	at org.apache.activemq.artemis.utils.actors.OrderedExecutor.doTask(OrderedExecutor.java:42) [artemis-commons-2.6.1.amq-720008.jar:2.6.1.amq-720008]
	at org.apache.activemq.artemis.utils.actors.OrderedExecutor.doTask(OrderedExecutor.java:31) [artemis-commons-2.6.1.amq-720008.jar:2.6.1.amq-720008]
	at org.apache.activemq.artemis.utils.actors.ProcessorBase.executePendingTasks(ProcessorBase.java:66) [artemis-commons-2.6.1.amq-720008.jar:2.6.1.amq-720008]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [rt.jar:1.8.0_102]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [rt.jar:1.8.0_102]
	at org.apache.activemq.artemis.utils.ActiveMQThreadFactory$1.run(ActiveMQThreadFactory.java:118) [artemis-commons-2.6.1.amq-720008.jar:2.6.1.amq-720008]

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          causes

          Bug - A problem that impairs or prevents the functions of the product. ENTMQBR-2011 Consumer of store-forward internal queues get dropped when syncing large messages

          • Critical - To be worked on immediately following BLOCKER issues.
          • Closed
          is duplicated by

          Bug - A problem that impairs or prevents the functions of the product. ENTMQBR-2461 HQPropertiesConverter class throws a java.util.ConcurrentModificationException while processing message headers

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Closed

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            People

              rhn-support-jbertram Justin Bertram
              rhn-support-kboone Kevin Boone
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              Dates

                Created:
                Updated:
                Resolved: