[jboss-user] [Beginners Corner] - Getting "Too many open files" error with JBoss 4.2.2GA
I am running into a problem with JBoss 4.2.2GA, front-ended with Apache 2.2.6 were JBoss
or the webserver seems to be hanging on to connections and leaving them in the CLOSE_WAIT
state. Then my application gets "Too many open files".
There was a post about this in the EJB/JBoss forum but there wasn't a resolution. I
thought I'd post my issue here to see if anyone has run into this. I can reproduce
this with a straight-forward hit to JBoss/tomcat. If I go directly to JBoss on port 8080 I
don't see the problem but going through Apache (KeepAlive is turned off) I do see this
problem. The test uses a single thread and just sends many requests over and over. We can
watch the number of open sockets climb until it gets close to the max 1024 and starts
spewing "Too many open files".
The open sockets are to port 8009 which is the port that JBoss listens to the Apache AJP
connector.
We are running on Linux FC6
I've seen various issues listing this same error but I haven't seen any solutions.
Our max file handles per user is 1024 which would see sufficient and the total max is over
200,000.
I did try this on the same machine with the same version of Apache and FC6 but using JBoss
4.0.4GA and JBoss 4.0.3SP1 and neither had the problem. It appears to be the version of
JBoss or some difference in the configuration. I have tried to make the configuration the
same.
Is anyone else running into this? Anyone figure a way out of this? Just bumping up the
number of max connections will just put the problem off till later. Any insight or help
will be appreciated. Thanks
The exceptions look like this:
10:34:50,698 ERROR [JIoEndpoint] Socket accept failed
java.net.SocketException: Too many open files
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
at java.net.ServerSocket.implAccept(ServerSocket.java:450)
at java.net.ServerSocket.accept(ServerSocket.java:421)
at
org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(DefaultServerSocketFactory.java:61)
at org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:309)
at java.lang.Thread.run(Thread.java:595)
10:34:50,698 ERROR [JIoEndpoint] Socket accept failed
java.net.SocketException: Too many open files
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
at java.net.ServerSocket.implAccept(ServerSocket.java:450)
at java.net.ServerSocket.accept(ServerSocket.java:421)
at
org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(DefaultServerSocketFactory.java:61)
at org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:309)
at java.lang.Thread.run(Thread.java:595)
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