Hi,
I am working with Restlet 2.1.2, using both client and server
code as parts of a larger applications.
After working correctly for some time (maybe days),
a GET request causes an endless succession of
"Too many open files" exceptions. As it happens,
those are being written into a log file (by nohup) and
eventually exhaust all available disk space -- it appears
the exceptions just keep pouring out, one after another.
Maybe the failed connection is retried immediately, so that
fails again with the same error? Just guessing. I looked at
the source code but I can't tell what's going on.
Here is one such exception. The message is printed by
ServerConnectionController.onSelected.
Unexpected error while accepting new connection
java.io.IOException: Too many open files
at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)
at
sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:163)
at
org.restlet.engine.connector.ServerConnectionController.onSelected(ServerConnectionController.java:103)
at
org.restlet.engine.connector.ConnectionController.selectKeys(ConnectionController.java:308)
at
org.restlet.engine.connector.ConnectionController.doRun(ConnectionController.java:171)
at org.restlet.engine.connector.Controller.run(Controller.java:159)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:679)
(Yes, maybe I could rework the logging configuration so
that it would only fill up a certain amount and then rotate
the log file. That doesn't address the underlying problem.)
It might (or might not) be the case that the error occurs
after a long time in which there are no requests -- i.e.
that it happens on the first request after a long pause.
Not sure about that.
Has anyone seen such a problem? Yes, it would really
help if I could narrow down the problem in time & space.
Yes, I certainly want to do that, and I have not yet
succeeded at it.
Host OS is RedHat Enterprise Linux 6.
java -version says:
java version "1.6.0_24"
OpenJDK Runtime Environment (IcedTea6 1.11.3) (rhel-1.48.1.11.3.el6_2-x86_64)
OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)
Thanks for any light you can shed on this problem.
Robert Dodier
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