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From jimmymartin <jamesmar...@paypal.com>
Subject ava.lang.OutOfMemoryError: Failed to fork OS thread - 5.2.0 broker
Date Tue, 06 Oct 2009 18:53:07 GMT

Hello,

I'm running a 5.2.0 broker that throws the error below after about 2 days of
running. I've seen some discussion from previous posts indicating that
changing the thread stack size via -Xss is the solution. Does anyone have a
suggestion as to the 'best' setting for this value for an activemq broker?
The default value appears to be 256K, at least for the Sun JVM.

Also if there are any other configuration tweaks that could alleviate this
problem, please let me know.

I have single broker with about 22 queues and approximately 24 connections
per queue handling some 50 to 100 events per second. I'm using an IBM 1.5
JVM on Linux. I've set the max heap size to 1024M.

Any help would be appreicated.

Thanks, Jimmy

2009-10-04 06:43:11,406 [190.39.16:52113] ERROR Service                       
- Async error occurred: java.lang.OutOfMemoryError: Failed to fork OS thread
java.lang.OutOfMemoryError: Failed to fork OS thread
	at java.lang.Thread.startImpl(Native Method)
	at java.lang.Thread.start(Thread.java:970)
	at
java.util.concurrent.ThreadPoolExecutor.addIfUnderMaximumPoolSize(ThreadPoolExecutor.java:470)
	at
java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:878)
	at
org.apache.activemq.thread.PooledTaskRunner.wakeup(PooledTaskRunner.java:76)
	at
org.apache.activemq.store.amq.AMQMessageStore.removeMessage(AMQMessageStore.java:276)
	at
org.apache.activemq.store.amq.AMQMessageStore.removeMessage(AMQMessageStore.java:213)
	at org.apache.activemq.broker.region.Queue.acknowledge(Queue.java:504)
	at org.apache.activemq.broker.region.Queue.removeMessage(Queue.java:1071)
	at
org.apache.activemq.broker.region.QueueSubscription.acknowledge(QueueSubscription.java:51)
	at
org.apache.activemq.broker.region.PrefetchSubscription.acknowledge(PrefetchSubscription.java:238)
	at
org.apache.activemq.broker.region.AbstractRegion.acknowledge(AbstractRegion.java:373)
	at
org.apache.activemq.broker.region.RegionBroker.acknowledge(RegionBroker.java:462)
	at
org.apache.activemq.broker.TransactionBroker.acknowledge(TransactionBroker.java:194)
	at
org.apache.activemq.broker.BrokerFilter.acknowledge(BrokerFilter.java:74)
	at
org.apache.activemq.broker.BrokerFilter.acknowledge(BrokerFilter.java:74)
	at
org.apache.activemq.broker.MutableBrokerFilter.acknowledge(MutableBrokerFilter.java:85)
	at
org.apache.activemq.broker.TransportConnection.processMessageAck(TransportConnection.java:456)
	at org.apache.activemq.command.MessageAck.visit(MessageAck.java:205)
	at
org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:305)
	at
org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:179)
	at
org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:68)
	at
org.apache.activemq.transport.WireFormatNegotiator.onCommand(WireFormatNegotiator.java:143)
	at
org.apache.activemq.transport.InactivityMonitor.onCommand(InactivityMonitor.java:206)
	at
org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:84)
	at
org.apache.activemq.transport.tcp.SslTransport.doConsume(SslTransport.java:104)
	at
org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:203)
	at
org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:185)
	at java.lang.Thread.run(Thread.java:803)

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