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Date: Tue, 31 Mar 2009 04:27:20 -0700 (PDT)
From: andymorris <andymorris81@gmail.com>
To: users@activemq.apache.org
Subject: Re: ActiveMQ 5.2 too many open files exception
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Hi

I experienced a problem like this with when we tried an HA setup with
master/slave but it only happened when running on RedHat Linux with Java 5
and the older 4.1 version of ActiveMQ.

There was no problem with the above config when running on Windows but when
we upgraded to Java 6 AND ActiveMQ 5.1 then the problem on RedHat went away.

Perhaps there's some clues to your problem? What is your setup?


deathemperor wrote:
> 
> I'm running AMQ 5.2.0 and keep getting the error:
> 
> 2009-03-31 08:41:28,674 [or@0.0.0.0:8161] WARN  log                           
> - EXCEPTION 
> java.io.IOException: Too many open files
> 	at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)
> 	at sun.nio.ch.ServerSocketChannelImpl.accept(Unknown Source)
> 	at
> org.mortbay.jetty.nio.SelectChannelConnector$1.acceptChannel(SelectChannelConnector.java:75)
> 	at
> org.mortbay.io.nio.SelectorManager$SelectSet.doSelect(SelectorManager.java:475)
> 	at org.mortbay.io.nio.SelectorManager.doSelect(SelectorManager.java:166)
> 	at
> org.mortbay.jetty.nio.SelectChannelConnector.accept(SelectChannelConnector.java:124)
> 	at
> org.mortbay.jetty.AbstractConnector$Acceptor.run(AbstractConnector.java:537)
> 	at
> org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:450)
> 
> This cause either of these problem:
> 
> - ActiveMQ process hangs on Apache, no messages can be sent or received,
> the AMQ admin is not responding at the time either.
> - AMQ & AMQ admin running but no messages can be sent although
> receiver/consumer can still connect and check for message.
> 
> 
> The pre-procedure is to start AMQ as background service, running message
> up to 18-20k and the above occurs.
> 
> Some of my conf:
> - maxFileLength: 1gb
> - ulimit -n: 10240
> - cealnupInterval: 1000 (ms)
> 
> 
> My another concern is why cealnupInterval doesn't work. Nothing get
> cleaned up as I expect the data file of the queue does.
> 
> Please anyone help.
> 

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