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From Rainer Jung <rainer.j...@kippdata.de>
Subject Re: R: RE: Re: intermittent SocketException on startup tomcat 5.5.28 and under JBOSS 4.2.3GA
Date Sat, 05 Jun 2010 09:09:50 GMT
On 05.06.2010 09:23, Pid * wrote:
> On 5 Jun 2010, at 04:33, "agonat@libero.it"<agonat@libero.it>  wrote:
>
>> Hi
>>     I m very tired because the intermittent socket close exception
>> reappear.
>>
>>     We now use tomcat 5.5.28 on win2003 ED SO and jdk 1.6.16.
>>     The error that occours is:
>>
>>     4-giu-2010 7.48.35

Date and Time in a bit strange format: 4th of June 2010, 07:48:35.

Rainer

> What is the above? It doesn't look familiar to me.
>
> Can you refresh our memories and please post the current server.xml
> (comments removed)?
>
>
> p
>
>> org.apache.tomcat.util.net.PoolTcpEndpoint acceptSocket
>> GRAVE: Endpoint ServerSocket
>> [addr=0.0.0.0/0.0.0.0,port=0,localport=8080]
>> ignored exception: java.net.SocketException: socket closed
>> java.net.SocketException: socket closed
>>     at java.net.PlainSocketImpl.socketAccept(Native Method)
>>     at java.net.PlainSocketImpl.accept(Unknown Source)
>>     at java.net.ServerSocket.implAccept(Unknown Source)
>>     at java.net.ServerSocket.accept(Unknown Source)
>>     at
>> org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket
>> (DefaultServerSocketFactory.java:61)
>>     at org.apache.tomcat.util.net.PoolTcpEndpoint.acceptSocket
>> (PoolTcpEndpoint.
>> java:408)
>>     at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt
>> (LeaderFollowerWorkerThread.java:71)
>>     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run
>> (ThreadPool.
>> java:689)
>>     at java.lang.Thread.run(Unknown Source)
>> 4-giu-2010 7.48.56 org.apache.tomcat.util.net.PoolTcpEndpoint
>> acceptSocket
>> AVVERTENZA: Reinitializing ServerSocket
>> 4-giu-2010 8.04.39 org.apache.tomcat.util.net.PoolTcpEndpoint
>> acceptSocket
>> GRAVE: Endpoint ServerSocket
>> [addr=0.0.0.0/0.0.0.0,port=0,localport=8080]
>> ignored exception: java.net.SocketException: socket closed
>> java.net.SocketException: socket closed
>>     at java.net.PlainSocketImpl.socketAccept(Native Method)
>>     at java.net.PlainSocketImpl.accept(Unknown Source)
>>     at java.net.ServerSocket.implAccept(Unknown Source)
>>     at java.net.ServerSocket.accept(Unknown Source)
>>     at
>> org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket
>> (DefaultServerSocketFactory.java:61)
>>     at org.apache.tomcat.util.net.PoolTcpEndpoint.acceptSocket
>> (PoolTcpEndpoint.
>> java:408)
>>     at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt
>> (LeaderFollowerWorkerThread.java:71)
>>     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run
>> (ThreadPool.
>> java:689)
>>     at java.lang.Thread.run(Unknown Source)
>> 4-giu-2010 8.05.00 org.apache.tomcat.util.net.PoolTcpEndpoint
>> acceptSocket
>> AVVERTENZA: Reinitializing ServerSocket
>> 4-giu-2010 8.05.00 org.apache.tomcat.util.net.PoolTcpEndpoint
>> acceptSocket
>> GRAVE: Endpoint ServerSocket
>> [addr=0.0.0.0/0.0.0.0,port=0,localport=8080]
>> ignored exception: java.net.SocketException: socket closed
>> java.net.SocketException: socket closed
>>     at java.net.PlainSocketImpl.socketAccept(Native Method)
>>     at java.net.PlainSocketImpl.accept(Unknown Source)
>>     at java.net.ServerSocket.implAccept(Unknown Source)
>>     at java.net.ServerSocket.accept(Unknown Source)
>>     at
>> org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket
>> (DefaultServerSocketFactory.java:61)
>>     at org.apache.tomcat.util.net.PoolTcpEndpoint.acceptSocket
>> (PoolTcpEndpoint.
>> java:408)
>>     at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt
>> (LeaderFollowerWorkerThread.java:71)
>>     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run
>> (ThreadPool.
>> java:689)
>>     at java.lang.Thread.run(Unknown Source)
>> 4-giu-2010 8.05.21 org.apache.tomcat.util.net.PoolTcpEndpoint
>> acceptSocket
>> AVVERTENZA: Reinitializing ServerSocket
>> 4-giu-2010 8.06.55 org.apache.tomcat.util.net.PoolTcpEndpoint
>> acceptSocket
>> GRAVE: Endpoint ServerSocket
>> [addr=0.0.0.0/0.0.0.0,port=0,localport=8080]
>> ignored exception: java.net.SocketException: socket closed
>> java.net.SocketException: socket closed
>>     at java.net.PlainSocketImpl.socketAccept(Native Method) .....
>>
>>     This error slow down the application.
>>
>>     we don't have  firewall, pool of tcp connection seem correct, the
>> processor
>> and memory usage are normal (10% CPU and 50% RAM).
>>
>>
>> How can  i investigte who cuse the problem?  Jconsole observe memory
>> but seem
>> not tcp connection.
>>     How can i understand why i have close socket?
>>     whath are flakey router error?
>>     How can i understand if i have saturate the connection on SO?
>>
>>     Thank for all suggest
>>     Best regards
>>     Agostino
>>
>>
>>
>>
>>> ----Messaggio originale----
>>> Da: Chuck.Caldarale@unisys.com
>>> Data: 24/05/2010 15.38
>>> A: "Tomcat Users List"<users@tomcat.apache.org>, "agonat@libero.it"
>> <agonat@libero.it>
>>> Ogg: RE: Re: intermittent SocketException on startup tomcat 5.5.28
>>> and under
>> JBOSS 4.2.3GA
>>>
>>>> From: agonat@libero.it [mailto:agonat@libero.it]
>>>> Subject: R: Re: intermittent SocketException on startup tomcat
>>>> 5.5.28
>>>> and under JBOSS 4.2.3GA
>>>>
>>>> ERROR [org.apache.tomcat.util.net.JIoEndpoint]
>>>> Socket accept failed
>>>> java.net.SocketException: socket closed
>>>
>>> This isn't really a problem with the Tomcat server - it usually
>>> means the
>> client terminated the connection attempt before the socket on the
>> server end
>> could be created.  If this is happening persistently, then something
>> in between
>> the client and Tomcat (e.g., a firewall or flakey router) is
>> dropping the
>> connection before it can be fully established.  There's also a
>> possibility that
>> Windows is reaching some resource limit and preventing creation of
>> the server
>> end of the connection.
>>>
>>> - Chuck

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