Solved

Tomcat getting out-of-memory errors

Posted on 2004-09-20
1
144 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:techhound
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 23

Accepted Solution

by:
rama_krishna580 earned 500 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

Get proactive database performance tuning online

At Percona’s web store you can order full Percona Database Performance Audit in minutes. Find out the health of your database, and how to improve it. Pay online with a credit card. Improve your database performance now!

Question has a verified solution.

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

Have you ever sent email via ColdFusion and thought of tracking this mail to capture the exact date and time when the message was opened ?  If yes, then this article is for you ! First we need a table user_email with columns user_id , email , sub…
Lease-to-own eliminates the expenditure of hardware replacement and allows you to pay off the server over time. Usually, this is much cheaper than leasing servers. Think of lease-to-own as credit without interest.
In this video we outline the Physical Segments view of NetCrunch network monitor. By following this brief how-to video, you will be able to learn how NetCrunch visualizes your network, how granular is the information collected, as well as where to f…
In this video, Percona Solution Engineer Dimitri Vanoverbeke discusses why you want to use at least three nodes in a database cluster. To discuss how Percona Consulting can help with your design and architecture needs for your database and infras…

622 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