The error "requested resource 'null'(null) not found" is caused by a user
requesting a non-existing servlet.  You can ignore that or find out why the
user gets a bad URL.

"OutOfMemoryError" is a different thing. I don't think they are related.  If
you have enough heap size, you may want to check the MaxPermSize and it
might run out of that if you use lots of JST stuff.  Turn on GC log and you
should see the situation.

HTH.
John

-----Original Message-----
From: Chris Boyce [mailto:[EMAIL PROTECTED] 
Sent: Thursday, March 10, 2005 5:04 PM
To: JRun-Talk
Subject: Requested resource not found/out of memory errors

Hello,

We are running JRun 4 Updater 3 (build 75991) in a Solaris environment.
For the most part things run smoothly, but several times a day this
message appears in the err log followed by a java.lang.OutOfMemoryError:

error Requested resource 'null' (null) not found
java.lang.OutOfMemoryError


The moment this occurs we see a significant spike in the number of
running JRun threads. I inadvertently reproduced this error in our QA
environment several months ago by not placing a "return" after a
sendRedirect. The return fixed the problem, so when these started in
production I combed through the code in search of an errant
sendRedirect. Alas, I couldn't find one.

In addition, we have also set a generous PermSize and MaxPermSize, and
the GC logging shows our PermGen consistently below 40% full.  Our free
heap space also averages around 800+MB.

I'm wondering two things. First, what kinds of conditions can cause this
error and, secondly, is there anything I can do to zero in on what's
causing it?

Thanks,

-- 
Chris Boyce





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