[jira] [Created] (DIRMINA-925) Unresponsive I/O once file limit is reached

["Paul Gregoire (JIRA)" <ji...@apache.org>]

Paul Gregoire created DIRMINA-925:
-------------------------------------

             Summary: Unresponsive I/O once file limit is reached
                 Key: DIRMINA-925
                 URL: https://issues.apache.org/jira/browse/DIRMINA-925
             Project: MINA
          Issue Type: Bug
          Components: Transport
    Affects Versions: 2.0.7, 2.0.5, 2.0.4
         Environment: Linux
            Reporter: Paul Gregoire


I had this issue reported to the red5 issues list and it reminded me of an issue on an internal company project that uses Mina but has nothing to do with red5 itself. So the common part in these two cases now is Mina, so I am posting this here.

The gist of both situations is that once the file limit is reached on the os, mina still attempts to do its work but an exception occurs which eventually runs the box of resources.

What steps will reproduce the problem?
1. Use telnet to connect to a servlet's socket until no more connections are allowed (open files limit is reached)
2. Use telnet to connect to the tomcat port (5080)
3. Observe red5.logs shown below will repeat until the hard drive fills

java.io.IOException: Too many open files
        at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method) ~[na:1.6.0_22]
        at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:163) ~[na:1.6.0_22]
        at org.apache.mina.transport.socket.nio.NioSocketAcceptor.accept(NioSocketAcceptor.java:170) ~[mi
na-core-2.0.4.jar:na]
        at org.apache.mina.transport.socket.nio.NioSocketAcceptor.accept(NioSocketAcceptor.java:51) ~[min
a-core-2.0.4.jar:na]
        at org.apache.mina.core.polling.AbstractPollingIoAcceptor$Acceptor.processHandles(AbstractPolling
IoAcceptor.java:501) ~[mina-core-2.0.4.jar:na]
        at org.apache.mina.core.polling.AbstractPollingIoAcceptor$Acceptor.run(AbstractPollingIoAcceptor.
java:442) ~[mina-core-2.0.4.jar:na]
        at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64) [mina-core-2.0
.4.jar:na]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [na:1.6.0_22]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [na:1.6.0_22]
        at java.lang.Thread.run(Thread.java:679) [na:1.6.0_22]
2012-12-13 15:42:28,521 [NioSocketAcceptor-2] WARN  o.a.m.util.DefaultExceptionMonitor - Unexpected exception.

Red5 issue #315 - Red5 gets into a tight loop writing error messages if file open limit is exceeded
https://code.google.com/p/red5/issues/detail?id=315

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