Re: Too many open files

André Warnier <aw@xxxxxxxxxx> · Wed, 08 Oct 2008 03:04:15 +0200

You are talking about Apache and Tomcat, but unless I am mistaken, what 

you are showing below as the result of lsof, is only java processes, 

which cannot be Apache.

Are you sure you somehow do not have a loop where Tomcat is connecting 

back to itself on the http port ? or from Tomcat to Apache ?

Mohit Anchlia wrote:

I got too many open files on my tomcat server but I see 994 instances
following connected to apache:

java    14130 root  965u  IPv4 30842366               TCP
localhost:41838->localhost:http (CLOSE_WAIT)
java    14130 root  966u  IPv4 30842367               TCP
localhost:41839->localhost:http (CLOSE_WAIT)
java    14130 root  967u  IPv4 30842371               TCP
localhost:41841->localhost:http (CLOSE_WAIT)
java    14130 root  968u  IPv4 30842465               TCP
localhost:41895->localhost:http (CLOSE_WAIT)
java    14130 root  969u  IPv4 30848501               TCP
localhost:42415->localhost:http (CLOSE_WAIT)
java    14130 root  970u  IPv4 30842533               TCP
localhost:41936->localhost:http (CLOSE_WAIT)
java    14130 root  971u  IPv4 30842468               TCP
localhost:41898->localhost:http (CLOSE_WAIT)
java    14130 root  972u  IPv4 30842534               TCP
localhost:41937->localhost:http (CLOSE_WAIT)
java    14130 root  973u  IPv4 30842765               TCP
localhost:42062->localhost:http (CLOSE_WAIT)
java    14130 root  974u  IPv4 30842472               TCP
localhost:41901->localhost:http (CLOSE_WAIT)
java    14130 root  975u  IPv4 30842122               TCP
localhost:41694->localhost:http (CLOSE_WAIT)
java    14130 root  976u  IPv4 30842123               TCP
localhost:41695->localhost:http (CLOSE_WAIT)
java    14130 root  977u  IPv4 30843217               TCP
localhost:42188->localhost:http (CLOSE_WAIT)
java    14130 root  978u  IPv4 30842125               TCP
localhost:41696->localhost:http (CLOSE_WAIT)

I get

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:310)
        at java.lang.Thread.run(Thread.java:595)

Could you please advise? I also don't understand why CLOSE_WAIT
contribute to too many open files. My file size is set to 1024 files

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