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Tomcat 5.0 crashes - no errors in logs
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Posted By:   Egidijus_Andreika
Posted On:   Tuesday, September 25, 2007 09:36 AM

Hello guys, I have a dedicated server (AMD 3200+) with 1GB of ram running an Apache Tomcat 5.0 version (it is integrated with Plesk). OS: RedHat el4 (Linux 2.6.9-42.0.8.EL) Java Servlets v2.4 MySQL: 4.1.20 Server software: Plesk version psa v8.1.0_build81070224.19 os_RedHat el4 I have my own Java application which runs on Tomcat. It uses MySQL as database. The Java application works fine, however sometimes Apache Tomcat 5.0 just crashes without any reasons. We have checked all tomcat logs, thread dumps to see if there are any errors and noticed: one second the server runs without a problem, then another second Tomcat just stops responding and th   More>>

Hello guys,

I have a dedicated server (AMD 3200+) with 1GB of ram running an Apache Tomcat 5.0 version (it is integrated with Plesk).


OS: RedHat el4 (Linux 2.6.9-42.0.8.EL)

Java Servlets v2.4

MySQL: 4.1.20

Server software: Plesk version psa v8.1.0_build81070224.19
os_RedHat el4




I have my own Java application which runs on Tomcat. It uses MySQL as database.
The Java application works fine, however sometimes Apache Tomcat 5.0 just crashes without any reasons. We have checked all tomcat logs, thread dumps to see if there are any errors and noticed:
one second the server runs without a problem, then another second Tomcat just stops responding and the logs are not recorded. It looks like Tomcat 5.0 crashes without any reason.


After we restart Tomcat, the logs continue. We cannot identify the problem which cause this.


Do you have any recommendations or ideas how we could solve this strange Tomcat crash problem?


Please, help us.


Thanks in advance,
Egidijus

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Re: Tomcat 5.0 crashes - no errors in logs

Posted By:   Robert_Lybarger  
Posted On:   Tuesday, September 25, 2007 07:57 PM

In that sort of case, you can only play "divide and conquer" with the problem. I'm in no way familiar with "plesk" or how it relates to tomcat. I'd suggest installing a standard distribution of tomcat w/ nothing else integrated into it, and running as few webapps in it as possible. Keep taking as many variables away from the problem until you start isolating it. That's the best advice I can give when you have no idea where the issue even is. :-/ I might also recommend running some equivalent of "memtest" to make sure all your machine's RAM is good and stable. Failing that, upgrade tomcat or mysql (but not at same time). And poke around any config files to see if you can crank up the logging level (to 'debug' or 'fine' or whatever).
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