hai kand,
iam also getting memmroy out of exception .Iam using Tomcat 3.2. Please specify
where to make changes .I have checked for -mx,-ss,-oss in wrapper.properties i
couldn't find them please help me
I even check for TOMCAT_OPTS i couldn't find it.
thanx in adv
shashi
On Wed, 29 Aug 2001 Kand, Khanderao wrote :
>Which version of tomcat / jdk are you using?
>
>pelase set the -mx -ss -oss JVM parameters properly.
>the default values of stack sizes are small. You might
>want to increase them. If you are using tomcat 3.x and
>with registry then you can set this parameters in
>wrapper.properties
>
>If you are using command line to start up tomcat, then
>you
>can probably use TOMCAT_OPTS and set this parameters to
>JVM.
>
>khanderao
>-----Original Message-----
>From: N D [mailto:[EMAIL PROTECTED]]
>Sent: Tuesday, August 28, 2001 12:58 PM
>To: [EMAIL PROTECTED]
>Subject: Re: Out Of memory in servlet -- another one
>
>
>typo
>
>--- N D <[EMAIL PROTECTED]> wrote:
>> Hi
>>
>> I followed up the discussion for Out of memory
>> error, but could not find something helpful to me. I
>> am also running into Out Of Memory error in tomcat.
>> I would apprecaite any help if anybody would like to
>> share any insights on this one.
>>
>> My scenario is as follows :
>> 1. I have multiple servlet threads corresponding
>> multiple http requests (I send simultaneous requests
>> through req. generator),
>> 2. Each servlet thread does some processing,
>> generates an async. event and waits to receive
>> response event from backend event generator.
>> 3. Each servlet session is supposed to wait for a
>> separate event. I have a (had to have) a single
>> static hashmap of objects where I put a lock object
>> and ID of the message sent. The servlet thread waits
>> on that lock object.
>> 4. When any event is generated the backend thread
>> accesses proper object through the use of message ID
>> from hashmap and notifies appropriate servlet thread
>> which in turn returns the response back to the user.
>>
>> If I have more than certain number of requests
>> simultaneously, I get OutOfMemory error, But if I
>> add little delay in those incoming requests I never
>> encounter any problem. I am using an object pool to
>> pre-create 1000 objects which I letter reuse for
>> locking. The problem exists only in the wait call,
>> that too in servlet. My test program with the same
>> wait/notify and multiple threads work file, too.
>>
>> I could not use profiler, somehow JProbe crashed on
>> Solaris, and I couldn't get any help on that. I have
>> increased the JVM memory, but to no effect.
>>
>>
>> This is my actual code :
>> public
>> String send(String aMessage, String aSubject,
>> String aMsgId) throws Exception
>> {
>> try
>> {
>> Object lLock = getLockFromMap(aMsgId);
>> sendMessage(aSubject, aMessage);
>>
>> // main thread will wait on every
>> message
>> // till gets notified by the receiver
>> thread
>> synchronized(lLock)
>> {
>> lLock.wait(mWaitTimeout);
>> }
>> }
>> catch( Exception e )
>> {
>> e.printStackTrace();
>> throw e;
>> }
>> catch( InterruptedException e)
>> {
>> System.exit(0);
>> }
>>
>> MessageInfo mInfo =
>> removeMessageInfoFromMap(aMsgId);
>> String msgData = new
>> String(mInfo.getMsgData());
>> mObjPool.release(mInfo);
>> mInfo = null;
>> return msgData;
>> }
>>
>> The methods to access map are synchronized.
>>
>> Thanks
>
>
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