[jetty-users] "A non-blocking socket operation could not be completed im

[Serkan Özkan <serkanozkan@xxxxxxxxx>]

Hello,

We are using jetty 9.3.6.v20151106 in our application and we have been seeing the following error, only on some windows environments. We don't know why it's happening.

2016-06-01 08:07:26,875  WARN  [org.eclipse.jetty.io.ManagedSelector] 

java.io.IOException: A non-blocking socket operation could not be completed immediately

at sun.nio.ch.SocketDispatcher.close0(Native Method) ~[?:1.8.0_91]

at sun.nio.ch.SocketDispatcher.close(SocketDispatcher.java:63) ~[?:1.8.0_91]

at sun.nio.ch.SocketChannelImpl.kill(SocketChannelImpl.java:879) ~[?:1.8.0_91]

at sun.nio.ch.WindowsSelectorImpl.implDereg(WindowsSelectorImpl.java:588) ~[?:1.8.0_91]

at sun.nio.ch.SelectorImpl.processDeregisterQueue(SelectorImpl.java:149) ~[?:1.8.0_91]

at sun.nio.ch.WindowsSelectorImpl.doSelect(WindowsSelectorImpl.java:171) ~[?:1.8.0_91]

at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86) ~[?:1.8.0_91]

at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97) ~[?:1.8.0_91]

at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101) ~[?:1.8.0_91]

at org.eclipse.jetty.io.ManagedSelector$SelectorProducer.select(ManagedSelector.java:232) ~[jetty-io-9.3.6.v20151106patch1.jar:9.3.6.v20151106patch1]

at org.eclipse.jetty.io.ManagedSelector$SelectorProducer.produce(ManagedSelector.java:180) ~[jetty-io-9.3.6.v20151106patch1.jar:9.3.6.v20151106patch1]

at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceAndRun(ExecuteProduceConsume.java:162) ~[jetty-util-9.3.6.v20151106patch1.jar:9.3.6.v20151106patch1]

at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:147) ~[jetty-util-9.3.6.v20151106patch1.jar:9.3.6.v20151106patch1]

at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:654) ~[jetty-util-9.3.6.v20151106patch1.jar:9.3.6.v20151106patch1]

at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:572) ~[jetty-util-9.3.6.v20151106patch1.jar:9.3.6.v20151106patch1]

at java.lang.Thread.run(Thread.java:745) [?:1.8.0_91]

In this case the selector seems to be closed (at line 261 at https://github.com/eclipse/jetty.project/blob/jetty-9.3.x/jetty-io/src/main/java/org/eclipse/jetty/io/ManagedSelector.java) and it does not seem to be recreated. After this error jetty becomes unresponsive and restarting the application seems to be the only solution.  

catch (Throwable x)
{
    closeNoExceptions(_selector); <<<<<====here
    if (isRunning())
    LOG.warn(x);
    else
    LOG.debug(x);
}

My questions are : 

- Can jetty recover from this error by changing some configuration settings etc? 

- Can this error be prevented (without changing windows settings etc)?

Thanks in advance