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https://issues.apache.org/activemq/browse/AMQ-2142?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rob Davies resolved AMQ-2142.
-----------------------------

       Resolution: Fixed
    Fix Version/s:     (was: 5.4.0)
                   5.3.0
         Assignee: Rob Davies

dedicatedTaskRunner (no separate thread to run a task) is now off by default

> An application but always throw out of memory exception 
> --------------------------------------------------------
>
>                 Key: AMQ-2142
>                 URL: https://issues.apache.org/activemq/browse/AMQ-2142
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 5.1.0
>         Environment: Apache tomcat 6.0.13 tomcat memory1024M  stack memory 
> maxim256M  thread stack size 4096KB
>  
>            Reporter: gongdonghui
>            Assignee: Rob Davies
>            Priority: Critical
>             Fix For: 5.3.0
>
>
> Exception in thread "InactivityMonitor Async Task: 
> java.util.concurrent.threadpoolexecutor$wor...@1a55477" 
> java.lang.OutOfMemoryError: unable to create new native thread
>       at java.lang.Thread.start0(Native Method)
>       at java.lang.Thread.start(Unknown Source)
>       at 
> org.apache.activemq.broker.TransportConnection.stopAsync(TransportConnection.java:904)
>       at 
> org.apache.activemq.broker.TransportConnection.serviceTransportException(TransportConnection.java:218)
>       at 
> org.apache.activemq.broker.TransportConnection$1.onException(TransportConnection.java:192)
>       at 
> org.apache.activemq.transport.TransportFilter.onException(TransportFilter.java:99)
>       at 
> org.apache.activemq.transport.TransportFilter.onException(TransportFilter.java:99)
>       at 
> org.apache.activemq.transport.WireFormatNegotiator.onException(WireFormatNegotiator.java:152)
>       at 
> org.apache.activemq.transport.InactivityMonitor.onException(InactivityMonitor.java:244)
>       at 
> org.apache.activemq.transport.InactivityMonitor$4.run(InactivityMonitor.java:164)
>       at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown 
> Source)
>       at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
>       at java.lang.Thread.run(Unknown Source)
> Exception in thread "ActiveMQ Transport Initiator: /218.26.227.189:12572" 
> java.lang.OutOfMemoryError: unable to create new native thread
>       at java.lang.Thread.start0(Native Method)
>       at java.lang.Thread.start(Unknown Source)
>       at 
> org.apache.activemq.transport.TransportThreadSupport.doStart(TransportThreadSupport.java:43)
>       at 
> org.apache.activemq.transport.tcp.TcpTransport.doStart(TcpTransport.java:382)
>       at org.apache.activemq.util.ServiceSupport.start(ServiceSupport.java:50)
>       at 
> org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:57)
>       at 
> org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:57)
>       at 
> org.apache.activemq.transport.WireFormatNegotiator.start(WireFormatNegotiator.java:72)
>       at 
> org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:57)
>       at 
> org.apache.activemq.broker.TransportConnection.start(TransportConnection.java:850)
>       at 
> org.apache.activemq.broker.TransportConnector$1$1.run(TransportConnector.java:213)
> Exception in thread "InactivityMonitor WriteCheck" 
> java.lang.OutOfMemoryError: unable to create new native thread
>       at java.lang.Thread.start0(Native Method)
>       at java.lang.Thread.start(Unknown Source)
>       at 
> java.util.concurrent.ThreadPoolExecutor.addIfUnderMaximumPoolSize(Unknown 
> Source)
>       at java.util.concurrent.ThreadPoolExecutor.execute(Unknown Source)
>       at 
> org.apache.activemq.transport.InactivityMonitor.writeCheck(InactivityMonitor.java:128)
>       at 
> org.apache.activemq.transport.InactivityMonitor$2.run(InactivityMonitor.java:103)
>       at 
> org.apache.activemq.thread.SchedulerTimerTask.run(SchedulerTimerTask.java:33)
>       at java.util.TimerThread.mainLoop(Unknown Source)
>       at java.util.TimerThread.run(Unknown Source)

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