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From "Daniel Perry" <d.pe...@netcase.co.uk>
Subject RE: java.lang.OutOfMemoryError after server app start/stop cyclin g
Date Fri, 14 May 2004 10:19:33 GMT
I have JAVA_OPTS and CATALINA_OPTS set to -Xmx1024M as system environment variables.

If i start tomcat using startup.bat it uses these.

If i start tomcat using as a windows service, it doesnt use these.

Daniel.

-----Original Message-----
From: McCormack, Chris [mailto:Chris.McCormack@littlewoods.co.uk]
Sent: 14 May 2004 11:09
To: Struts Users Mailing List
Subject: RE: java.lang.OutOfMemoryError after server app start/stop
cyclin g


Type java -X in a windows shell and look at setting some of the below options in your environment
using JAVA_OPTS

 -Xms<size>        set initial Java heap size
 -Xmx<size>        set maximum Java heap size
 -Xss<size>        set java thread stack size

I alse use this to allocate more memory to ant at build time for a large application. 'set
ANT_OPTS=-Xmx512m' (in a .bat) or pop it in your environment profile.

Chris McCormack

-----Original Message-----
From: Daniel Perry [mailto:d.perry@netcase.co.uk]
Sent: 14 May 2004 10:54
To: Struts Users Mailing List
Subject: RE: java.lang.OutOfMemoryError after server app start/stop
cyclin g


I'm using jdk1.4.2_04, and it still happens!

Here are some of my observations on the issue:

1. I did once develop some software using servlets/jsps. I never came accross this problem.
 However, as jsps are automatically releaded, and this app was mainly jsp based, i dont remeber
doing any restarting :)

2. running a memory intensive / complex app, it runs out of memory a lot quicker :)

3. If i run the stopapp and startapp ant tasks in a loop it runs out of memory with my struts
app pretty quickly.  Doing the same thing to axis takes a lot longer.

So, i figure its not restricted to struts.

Anyway, still cant figure out how to increase max memory if it's running as a windows service?

Daniel.




-----Original Message-----
From: Jignesh Patel [mailto:jpatel@bangtechnology.com]
Sent: 14 May 2004 04:45
To: Struts Users Mailing List; Heinle, Chuck
Subject: Re: java.lang.OutOfMemoryError after server app start/stop
cyclin g


As per my knowledge the bug of OutOfMemory is related to version less then 
jdk1.4. It has been solved in the 1.4.

-Jignesh
On Thursday 13 May 2004 23:30, Heinle, Chuck wrote:
> We have a similar problem with WebLogic 8.1 SP2...I was told by an
> associate that there is a 1.4.2_02 bug related class loading that might
> associated with the OutOfMemory.
>
> -----Original Message-----
> From: Joe Germuska [mailto:Joe@Germuska.com]
> Sent: Thursday, May 13, 2004 1:52 PM
> To: Struts Users Mailing List
> Subject: RE: java.lang.OutOfMemoryError after server app start/stop cycling
>
> At 6:07 PM +0100 5/13/04, Daniel Perry wrote:
> >Putting up the maximum memory Xmx does help as it gives it more memory to
> >use up, but only delays the inevitable :)
> >
> >Is this a struts issue? or does it happen with all tomcat apps?
>
> It happens with every servlet container I've used.  My understanding
> is that to redeploy a webapp, app servers generally discard the
> classloader they have been using and make a new one.  For various
> reasons, this can leave orphan objects which are never garbage
> collected.  If enough of these accumulate, you run out of memory.
>
> Admittedly, I use Struts in all these cases, you might argue that
> it's a Struts issue, since that's the common feature, but I can't
> think of anyways Struts is being particularly careless in a way that
> would aggravate this problem.
>
> I may have a completely wrong understanding of the problem too, but
> this is how we explain it to ourselves around here!
>
> Joe

-- 
Jignesh Patel
Project Leader
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 (E) jpatel@bangtechnology.com

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