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From Rick Roberts <techi...@ait-web.com>
Subject Re: Tomcat Crashing on Linux
Date Tue, 29 Jul 2003 16:29:25 GMT
I had not seen this problem before I recently started implementing JDBCRealm on 
these servers.

Anyone else having stability problems when using Oracle & JDBCRealm?


Rick Roberts wrote:
> Also,
> The only way I can clear this error is to reboot the machine.
> 
> Here is another piece of info I get from "catalina_log.2003-07-29.txt" 
> when I try the 2nd restart (/etc/init.d/tomcat restart)
> 
> 2003-07-29 11:06:33 JDBCRealm[Standalone]: Exception closing database 
> connection
> java.sql.SQLException: Io exception: Broken pipe
>         at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:114)
>         at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:156)
>         at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:269)
>         at 
> oracle.jdbc.driver.OracleConnection.close(OracleConnection.java:557)
>         at org.apache.catalina.realm.JDBCRealm.close(Unknown Source)
>         at org.apache.catalina.realm.JDBCRealm.stop(Unknown Source)
>         at org.apache.catalina.core.ContainerBase.stop(Unknown Source)
>         at org.apache.catalina.core.StandardService.stop(Unknown Source)
>         at org.apache.catalina.core.StandardServer.stop(Unknown Source)
>         at org.apache.catalina.startup.Catalina.start(Unknown Source)
>         at org.apache.catalina.startup.Catalina.execute(Unknown Source)
>         at org.apache.catalina.startup.Catalina.process(Unknown Source)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
> 
>         at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

> 
>         at java.lang.reflect.Method.invoke(Method.java:324)
>         at org.apache.catalina.startup.Bootstrap.main(Unknown Source)
> 
> 
> 
> Rick Roberts wrote:
> 
>> Tomcat is crashing every 2 - 3 days on 2 different Linux machines.
>> Both machines are running pretty much identical software configurations.
>> Both machines are serving the same web application so, it's almost 
>> certainly something in my web app code that causes the problem.  
>> However; the logs from my  web app do not tell me anything.
>>
>> I am seeing this error on 2 different Linux machines.
>> Tomcat just stops responding to my requests.
>> Also when I restart Tomcat (using: "/etc/init.d/tomcat restart"), I 
>> get this:
>>
>> [root@abraxas root]# /etc/init.d/tomcat4 restart
>> waiting for processes to exit                              [  OK  ]
>> waiting for processes to exit
>> waiting for processes to exit
>> waiting for processes to exit
>> waiting for processes to exit
>> waiting for processes to exit
>> waiting for processes to exit
>> waiting for processes to exit
>>
>>
>> The only info from logs I can find is from catalina.out:
>>
>> Jul 29, 2003 10:54:06 AM org.apache.tomcat.util.net.PoolTcpEndpoint 
>> closeServerSocket
>> SEVERE: Caught exception trying to unlock accept.
>> java.net.ConnectException: Connection refused
>>         at java.net.PlainSocketImpl.socketConnect(Native Method)
>>         at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:305)
>>         at 
>> java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:171)
>>         at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:158)
>>         at java.net.Socket.connect(Socket.java:426)
>>         at java.net.Socket.connect(Socket.java:376)
>>         at java.net.Socket.<init>(Socket.java:291)
>>         at java.net.Socket.<init>(Socket.java:119)
>>         at 
>> org.apache.tomcat.util.net.PoolTcpEndpoint.closeServerSocket(PoolTcpEndpoint.java:326)

>>
>>         at 
>> org.apache.tomcat.util.net.PoolTcpEndpoint.acceptSocket(PoolTcpEndpoint.java:397)

>>
>>         at 
>> org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:529) 
>>
>>         at 
>> org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)

>>
>>         at java.lang.Thread.run(Thread.java:536)
>> Jul 29, 2003 10:54:07 AM org.apache.tomcat.util.net.PoolTcpEndpoint 
>> closeServerSocket
>> SEVERE: Caught exception trying to close socket.
>> java.lang.NullPointerException
>>         at 
>> org.apache.tomcat.util.net.PoolTcpEndpoint.closeServerSocket(PoolTcpEndpoint.java:338)

>>
>>         at 
>> org.apache.tomcat.util.net.PoolTcpEndpoint.acceptSocket(PoolTcpEndpoint.java:397)

>>
>>         at 
>> org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:529) 
>>
>>         at 
>> org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)

>>
>>         at java.lang.Thread.run(Thread.java:536)
>> Jul 29, 2003 10:54:07 AM org.apache.tomcat.util.net.PoolTcpEndpoint 
>> acceptSocket
>> WARNING: Reinitializing ServerSocket
>>
>>
>> I'm using:
>> RH 9 (kernel 2.4.20-19.9)
>> Tomcat 4.1.24 ( RPM tomcat4-4.1.24-full.2jpp)
>> Sun JDK 1.4 (j2sdk1.4.2)
>>
>> Any help greatly appreciated.
>>
>> Thanks,
>>
> 

-- 
*******************************************
* Rick Roberts                            *
* Advanced Information Technologies, Inc. *
*******************************************


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