Divolte crashed: Too many open files

[Peter Ruijter]

Hi,

In our cluster, Divolte crashed with the error message "Too many open files". 

[XNIO-1 Accept] ERROR [server]: Exception accepting request, closing server channel TCP server (NIO) <6a29ab6e>
java.io.IOException: Too many open files
 at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)
 at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:422)
 at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:250)
 at org.xnio.nio.QueuedNioTcpServer.handleReady(QueuedNioTcpServer.java:467)
 at org.xnio.nio.QueuedNioTcpServerHandle.handleReady(QueuedNioTcpServerHandle.java:38)
 at org.xnio.nio.WorkerThread.run(WorkerThread.java:561)

The user under which divolte runs has a userlimit of 1048576. 

`ulimit -Hn`
1048576

This number is equal to divolte.global.mapper.buffer_size inside the Divolte configuration. Is this value set by Divolte or is it better to modify this value in /etc/security/limits.conf? 

I'm looking forward to your reaction...

Kind regards,

Peter

[Friso van Vollenhoven]

Hi Peter,

The config option you mention is not related to the number of file descriptors that Divolte will use. It is a in memory buffer size for incoming events, as per the docs here. It just happens to default to 10M.

The error looks like you have too many TCPs going on. It's unfortunate that XNIO apparently kills the server instead of just dropping connections in this case. You could try to bump the ulimit for files to unlimited.

Friso

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[Peter Ruijter]

Hi Friso,

Thanks for your quick reply. I will set the ulimit for the Divolte files to unlimited and sharpen the monitoring.

Peter

[James Walton]

please remove me from the group I am not supposed to be there/ 

jwal...@gmail.com

thanks

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