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Posted to users@tomcat.apache.org by ma...@idraprince.com on 2003/03/28 14:17:08 UTC
Memory Woes
Hello,
Has anyone had any memory issues when running Tomcat in a production
environment where it stays up for weeks? I have a webapp that is fairly
intense, using the Struts framework (which is great, by the way!) with
streaming data to sockets and database logging to mySQL. I have several of
these apps running in one Tomcat installation.
My problem is that memory usage keeps steadily creeping up on me until I start
getting the dreaded java.lang.OutOfMemoryError (or something like that).
I bumped up the memory settings for the JVM memory settings, which simply
delays the problem, but it still happens. (-Xmx... )
I have also profiled the application, and found that after garbage collection
all of my objects go back to the original usage levels (as far as instances). None of them are continually appending to a string or anything like that... mainly just state information.
I'm not sure where to go from here - having to occasionally restart Tomcat
once a month is not a workable solution for me.
Any advice would be GREATLY appreciated!
Mark
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Re: Memory Woes
Posted by Mark Pease <mp...@chartermi.net>.
Jake - you are a genius! I reverted back to 1.4.0_03 and the memory leak
problem seems to have gone away. I am heavily dependent on StringBuffers
for generating XML, so this bug was really causing problems.
Thanks for your time!
Mark
----- Original Message -----
From: "Jacob Kjome" <ho...@visi.com>
To: "Tomcat Users List" <to...@jakarta.apache.org>
Sent: Monday, March 31, 2003 11:28 AM
Subject: Re: Memory Woes
>
> Possibly this StringBufffer.toString() memory leak bug in j2sdk1.4.1?
What
> JDK do you use? j2sdk1.4.0 doesn't suffer from this issue...
> http://developer.java.sun.com/developer/bugParade/bugs/4724129.html
>
> Jake
>
> At 03:05 PM 3/30/2003 -0500, you wrote:
> >Actually, this is 100% servlet-powered... no JSP pages are used. Anyone
> >else know of any issues?
> >
> >Mark
> >
> >----- Original Message -----
> >From: <ma...@idraprince.com>
> >To: <to...@jakarta.apache.org>
> >Sent: Friday, March 28, 2003 8:17 AM
> >Subject: Memory Woes
> >
> >
> >Hello,
> >
> >Has anyone had any memory issues when running Tomcat in a production
> >environment where it stays up for weeks? I have a webapp that is fairly
> >intense, using the Struts framework (which is great, by the way!) with
> >streaming data to sockets and database logging to mySQL. I have several
of
> >these apps running in one Tomcat installation.
> >
> >My problem is that memory usage keeps steadily creeping up on me until I
> >start
> >getting the dreaded java.lang.OutOfMemoryError (or something like that).
> >
> >I bumped up the memory settings for the JVM memory settings, which simply
> >delays the problem, but it still happens. (-Xmx... )
> >
> >I have also profiled the application, and found that after garbage
> >collection
> >all of my objects go back to the original usage levels (as far as
> >instances). None of them are continually appending to a string or
anything
> >like that... mainly just state information.
> >
> >I'm not sure where to go from here - having to occasionally restart
Tomcat
> >once a month is not a workable solution for me.
> >
> >Any advice would be GREATLY appreciated!
> >
> >Mark
> >
> >
> >
> >---------------------------------------------------------------------
> >To unsubscribe, e-mail: tomcat-user-unsubscribe@jakarta.apache.org
> >For additional commands, e-mail: tomcat-user-help@jakarta.apache.org
> >
> >
> >---------------------------------------------------------------------
> >To unsubscribe, e-mail: tomcat-user-unsubscribe@jakarta.apache.org
> >For additional commands, e-mail: tomcat-user-help@jakarta.apache.org
>
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Re: Memory Woes
Posted by Jacob Kjome <ho...@visi.com>.
Possibly this StringBufffer.toString() memory leak bug in j2sdk1.4.1? What
JDK do you use? j2sdk1.4.0 doesn't suffer from this issue...
http://developer.java.sun.com/developer/bugParade/bugs/4724129.html
Jake
At 03:05 PM 3/30/2003 -0500, you wrote:
>Actually, this is 100% servlet-powered... no JSP pages are used. Anyone
>else know of any issues?
>
>Mark
>
>----- Original Message -----
>From: <ma...@idraprince.com>
>To: <to...@jakarta.apache.org>
>Sent: Friday, March 28, 2003 8:17 AM
>Subject: Memory Woes
>
>
>Hello,
>
>Has anyone had any memory issues when running Tomcat in a production
>environment where it stays up for weeks? I have a webapp that is fairly
>intense, using the Struts framework (which is great, by the way!) with
>streaming data to sockets and database logging to mySQL. I have several of
>these apps running in one Tomcat installation.
>
>My problem is that memory usage keeps steadily creeping up on me until I
>start
>getting the dreaded java.lang.OutOfMemoryError (or something like that).
>
>I bumped up the memory settings for the JVM memory settings, which simply
>delays the problem, but it still happens. (-Xmx... )
>
>I have also profiled the application, and found that after garbage
>collection
>all of my objects go back to the original usage levels (as far as
>instances). None of them are continually appending to a string or anything
>like that... mainly just state information.
>
>I'm not sure where to go from here - having to occasionally restart Tomcat
>once a month is not a workable solution for me.
>
>Any advice would be GREATLY appreciated!
>
>Mark
>
>
>
>---------------------------------------------------------------------
>To unsubscribe, e-mail: tomcat-user-unsubscribe@jakarta.apache.org
>For additional commands, e-mail: tomcat-user-help@jakarta.apache.org
>
>
>---------------------------------------------------------------------
>To unsubscribe, e-mail: tomcat-user-unsubscribe@jakarta.apache.org
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Re: Memory Woes
Posted by Mark Pease <mp...@chartermi.net>.
Actually, this is 100% servlet-powered... no JSP pages are used. Anyone
else know of any issues?
Mark
----- Original Message -----
From: <ma...@idraprince.com>
To: <to...@jakarta.apache.org>
Sent: Friday, March 28, 2003 8:17 AM
Subject: Memory Woes
Hello,
Has anyone had any memory issues when running Tomcat in a production
environment where it stays up for weeks? I have a webapp that is fairly
intense, using the Struts framework (which is great, by the way!) with
streaming data to sockets and database logging to mySQL. I have several of
these apps running in one Tomcat installation.
My problem is that memory usage keeps steadily creeping up on me until I
start
getting the dreaded java.lang.OutOfMemoryError (or something like that).
I bumped up the memory settings for the JVM memory settings, which simply
delays the problem, but it still happens. (-Xmx... )
I have also profiled the application, and found that after garbage
collection
all of my objects go back to the original usage levels (as far as
instances). None of them are continually appending to a string or anything
like that... mainly just state information.
I'm not sure where to go from here - having to occasionally restart Tomcat
once a month is not a workable solution for me.
Any advice would be GREATLY appreciated!
Mark
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---------------------------------------------------------------------
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