WebSphere Problem

Hi hin_01,

Just a link here: http://www-4.ibm.com/software/webservers/appserv/

See if it's help.

it get's restarted if you have it running as nohup mode and you call System.exit(0) anywhere in your code, or an exception or error causes the jvm to crash, it will automatically restart the instance again

black,
  Anywhere I can get information on this restarting issue of WebSphere?

  Then how can I actually know the reason of the restarted of WebSphere is causing by the specific problem that stated by you.  Any way that I can trace the issue?

  Thanks a lot.


 

First make sure you don't have any System.exit(0) lines in your code.
Second check the websphere logs, in particular the err log for any exceptions.
I usually just do a search on the ibm website support. I've also got the course notes from the web sphere administration course which were pretty good.

Black,
  my code didn't use any exit(0) command. and from the WebSphere err log I can see that sometimes it hits error like outofmemory .... but what cause WAS run out of memory?

  If let's say WAS need to communicate with Informix DB through JDBC driver, and somehow the processing at informix side is slow, would this cause the WebSphere App. Server to jam out which cause WAS run out of memory?
 
  Becuase of this we dun really know what cause WAS to restart by itself.

  Please assist.

  Thanks

Yes that would explain it. If it runs out of memory the appserver could quite possible restart itself, it would run out of memory simply because it used up all the space allocated to it.
If you have more available memory you could try starting up the jvm for your particular server with more memory using the mx option. For example you could use -mx128m which will tell the jvm to have an initial heap size of 128 megabytes.
The slow processing would not cause out of memory errors, it should mean that your appserver sits idle while it waits for a response.
One more thing, did you see any other exceptions like a TCP socket exception from the database? sometimes you get a Socket reset by peer exception from the database which causes the JVM to crash and that would also cause the appserver to restart.
Your best bet is to addres each of the exceptions in your error log one by one, first increase the memory. Increasing the memory might mask your error, it might occur but less regularly now so make sure you look at any other exceptions that are present in your log files.
Good luck!

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for my 2 cents worth - Well I'm not sure if this question is useful for anyone else and I don't think it's answered the question asked. Basically feel free to delete the question Moondancer:)

I appreciate your response, black, thank you.

I'll give this a few days, since I updated each of the open questions in the hopes that hln_01 will return and finalize them directly.

Moondancer
Community Support Moderator @ Experts Exchange

MoonDancer,
  How can I drop a question?

  Please do assist.
  Thanks.

hln_01