Re: JVM crash with Log4J.

2010-04-08 Thread Shahnaz Ali
We have test server but how we will create actual load on that. Recreating this problem is a challenge. After restarting, its working fine from last around 3 weeks. One server receives 80,000 call requests in a day on average. Since then no issue It is basically serving VXML for telephony calls

Re: JVM crash with Log4J.

2010-04-08 Thread Michael Erskine
On 8 April 2010 10:27, Shahnaz Ali wrote: > Its not possible to do these kind of experiments in running production > server. But i am sure there is nothing happened like redeploying new war, > jar or any kind of change. Server was untouched for last several hours. Don't you have an identical test

Re: JVM crash with Log4J.

2010-04-08 Thread Shahnaz Ali
Hi, Its not possible to do these kind of experiments in running production server. But i am sure there is nothing happened like redeploying new war, jar or any kind of change. Server was untouched for last several hours. Logs are not fabricated, yeah i took only the portion when problem started.

Re: JVM crash with Log4J.

2010-04-08 Thread Michael Erskine
On 8 April 2010 07:47, Shahnaz Ali wrote: > No, there was no any hot deployment. But the evidence points to a change of class so something equivalent to a redeployment must have happened. Something caused a deployed class to be reloaded and that operation failed due to a class incompatibility. Th

Re: JVM crash with Log4J.

2010-04-07 Thread Shahnaz Ali
No, there was no any hot deployment. We deploy our application WAR file and restart tomcat. This is a must for us. And there was no any change to Log4J library jar file. BR, Shahnaz Ali. On Thu, Apr 8, 2010 at 12:13 PM, Yair Ogen wrote: > Hot deploy is when you load a new version of a war for

Re: JVM crash with Log4J.

2010-04-07 Thread Yair Ogen
Hot deploy is when you load a new version of a war for example while the server is still running. This triggers a chain of init actions on the server side. I see from the logs the doGet method in the servlet caused a init of log4j configuration. try looking in that direction. I think this should

Re: JVM crash with Log4J.

2010-04-07 Thread Shahnaz Ali
Hi, Thanks for your quick response. This crash happens only once so far in a year. After restart of OS and Tomcat, without any change system is working fine again. This is a telco system, so they need to know reason of crash. And if possible solution of that. Actually this is a server side appli

Re: JVM crash with Log4J.

2010-04-07 Thread Michael Erskine
On 7 April 2010 13:19, Shahnaz Ali wrote: > We have IVR application running on tomcat web application server on Redhat > linux OS, using Log4J. This is a mission critical server application with > good amount of call load. > > Recently we faced JVM (tomcat) crash and major of errors before crash >

Re: JVM crash with Log4J.

2010-04-07 Thread Yair Ogen
are you using hot deploy on Tomcat? which version of log4j are you using? On Wed, Apr 7, 2010 at 3:19 PM, Shahnaz Ali wrote: > Hi, > > We have IVR application running on tomcat web application server on Redhat > linux OS, using Log4J. This is a mission critical server application with > good am