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From Pid <...@pidster.com>
Subject Re: R: RE: Re: intermittent SocketException on startup tomcat 5.5.28 and under JBOSS 4.2.3GA
Date Sat, 05 Jun 2010 13:20:40 GMT
On 05/06/2010 10:09, Rainer Jung wrote:
> 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.

Ah. Yes.  :)


p

>> 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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