java - Why is my Tomcat server restarting and what is org.apache.catalina.core.AprLifecycleListener? -

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I am trying to understand why my web app is (I did not write it, but I should debug it ) Continuing to restart the Tomcat Web server. I see in the log before the server restarts: 

  July 24, 2009 7:52:15 AM. Org.apache.catalina.core.AprLifecycleListener Lifecycle Information: Apache Portable Runtime which allows optimal performance in production environment was not found on java.library.path: /usr/local/jdk1.5.0_09/jre/lib/i386 /server:/usr/local/jdk1.5.0_09/jre/lib/i386: /usr/local/jdk1.5.0_09/jre/../lib/i386 July 24, 2009 7:52:15 AM org.apache .coyote.http11.Http11BaseProtocol init

i can do the same processing on other groups of files and it works fine, but by restarting the server by doing a special group Causes. Mostly I am hoping someone can tell me that this may just be an end of time, or if there are any other log files, tell me why this is dying.

Update : I have tried to start the server with the bin / catalina.sh run , and if it is time-out, then increase it There is no way

puts the output on stanadard instead of catalina.out, and instead of my app's progress is the progress of my app and then "killed"

On the one hand, I do not know whether the restart is happening, but when I try to restart the server with run bin / catalina.sh , I get a band exception, so some it is restarted.

Update 2 : This was using Tomcat 5.5 and Java 5. I have set up Tomcat 6 and have set it to use Java 6, and this is happening. Besides, if I "echo $?" After "killed", it gives me "137", which probably indicates that the hosting company is killing it for some reason.

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