?
Solved

Tomcat getting out-of-memory errors

Posted on 2004-09-20
1
Medium Priority
?
177 Views
Last Modified: 2010-08-05
Hi,

I am getting intermittent out-of-memory errors on Tomcat.  The server is Windows 2003 with 2 Gig of memory.  We do share the server with an MS-SQL Server but there are only 16 or so people using it, hardly concurrently either.  We check all our database connections are getting closed.  I am not sure what to look for or where to look.  If it is a matter of expanding the Tomcat memory, can you please advise on how to do that?

Thanks
0
Comment
Question by:James Cochrane
1 Comment
 
LVL 23

Accepted Solution

by:
rama_krishna580 earned 2000 total points
ID: 12108390
Hi,

1) I suspected this to be the JSP compiler, however, it turns out to be part of the Hotspot engine. This component running out of memory is only a symptom, not the cause of the problem. It probably is your code causing the problem.

ad 2) Sorry, I misinterpreted this to be the JSP compiler. It is the hotspot engine. Go to http://forums.itrc.hp.com/cm/1,,,00.html and select "search". Type in "CompileThread0" and you will get pointers to two articles hinting at a possible bug in the JVM/Hotspot engine and/or missing patches. As one of the messages is dated February, you may actually find a patch correcting this if it is a JVM bug.

ad 3) That's a random effect.

ad 4) As I mentioned, we have also found funny effects with Tomcat 3. Try to upgrade to Tomcat 4 and see if the problem persists. Chances are, the more recent Xerces and Tomcat libraries work more reliable.

ad 5) You can quickly define a LoggingStream which basically forwards all method calls to an underlying Stream object, but also logs data being sent back and forth. This is a rather trivial exercise, so I am not including code here.

If you have a chance to try your code on a Solaris or Linux system, try it. My suspicion is that your code will run just fine under these operating systems with Tomcat 4.

I am afraid, this is all I can offer to help... good luck!!!

R.K
0

Featured Post

[Webinar] Kill tickets & tabs using PowerShell

Are you tired of cycling through the same browser tabs everyday to close the same repetitive tickets? In this webinar JumpCloud will show how you can leverage RESTful APIs to build your own PowerShell modules to kill tickets & tabs using the PowerShell command Invoke-RestMethod.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

What You Need to Know when Searching for a Webhost Provider
When it comes to security, close monitoring is a must. According to WhiteHat Security annual report, a substantial number of all web applications are vulnerable always. Monitis offers a new product - fully-featured Website security monitoring and pr…
How to fix display issue, screen flickering issue when I plug in power cord to the machine. Before I start explaining the solution lets check out once the issue how it looks like after I connect the power cord. most of you also have faced this…
This video tutorial shows you the steps to go through to set up what I believe to be the best email app on the android platform to read Exchange mail.  Get the app on your phone: The first step is to make sure you have the Samsung Email app on your …
Suggested Courses
Course of the Month4 days, 20 hours left to enroll

601 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question