On 2 May 2012, at 20:19, David Wall <d.w...@computer.org> wrote:

> I am running Tomcat 7.0.26 on Linux we received a lot of the following 
> exceptions during load testing:
>
> May 2, 2012 3:04:03 AM org.apache.tomcat.util.net.NioEndpoint$Acceptor run
> SEVERE: Socket accept failed
> java.io.IOException: Too many open files
>        at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)
>        at 
> sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:152)
>        at 
> org.apache.tomcat.util.net.NioEndpoint$Acceptor.run(NioEndpoint.java:784)
>        at java.lang.Thread.run(Thread.java:662)
>
> Is there something I can tune to remove this as a problem?

It's an OS issue: google 'ulimit'.


p


> My NIO+SSL connector is configured like this:
>
> <Connector port="8443" protocol="org.apache.coyote.http11.Http11NioProtocol" 
> SSLEnabled="true"
>               maxThreads="800" scheme="https" secure="true" acceptCount="200" 
> connectionTimeout="4000" acceptorThreadCount="2"
>                keystoreFile="keys/tomcatkeys" keystorePass="VALUEREMOVED"
>               clientAuth="false" sslProtocol="TLS" />
>
> During the test, we had created about 1,800 concurrent sessions, though I 
> think many of those were active because of the exceptions kept the user's 
> transaction from completing and when their session would end normally.
>
> Thanks,
> David
>
>
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