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From sebb <seb...@gmail.com>
Subject Re: Out of memory almost immediately after start
Date Mon, 28 Mar 2011 13:17:51 GMT
On 28 March 2011 14:10, Cor-Paul Bezemer <c.bezemer@tudelft.nl> wrote:
> Well actually this always happens after creating the first 10 threads,
> after this hundreds of threads may be created without error messages.

Is there some one-time initialisation being performed by one of the
early threads?
If so, perhaps this uses up lots of memory which is then released.

Otherwise, it sounds like a Java or OS bug.

I assume this only happens for specific test plans?
Have you tried seeing if disabling some test elements changes the behaviour?

>
> CP
>
> -----Original Message-----
> From: Anthony Johnson [mailto:ansoni@gmail.com]
> Sent: maandag 28 maart 2011 14:05
> To: JMeter Users List
> Cc: Cor-Paul Bezemer
> Subject: Re: Out of memory almost immediately after start
>
> We just had a similar thread related to this, but the problem is that
> Java itself does not have enough native memory left to create a
> thread.
>
> This is going to be related to your -Xmx -Xms settings and the amount
> of threads that you are asking JMeter to run.
>
> Try lowering your thread count, setting -Xms JVM setting and/or
> lowering the -Xmx value to allow for more native memory.
>
> Their are other tricks as well, but the ones above should get you back on
> track.
>
> Good luck,
>
> Anthony
>
> On Mon, Mar 28, 2011 at 7:34 AM, Cor-Paul Bezemer <c.bezemer@tudelft.nl>
> wrote:
>> I'm investigating a problem I have with one of my testcases and when I
>> inspect the log file, I see the following happen:
>>
>> 2011/03/28 13:30:38 INFO  - jmeter.threads.JMeterThread: Thread started:
>> Stepping Thread Group 1-2
>> 2011/03/28 13:30:38 INFO  - jmeter.threads.JMeterThread: Thread started:
>> Stepping Thread Group 1-6
>> 2011/03/28 13:30:38 INFO  - jmeter.threads.JMeterThread: Thread started:
>> Stepping Thread Group 1-8
>> 2011/03/28 13:30:38 INFO  - jmeter.threads.JMeterThread: Thread started:
>> Stepping Thread Group 1-10
>> 2011/03/28 13:30:38 INFO  - jmeter.threads.JMeterThread: Thread started:
>> Stepping Thread Group 1-1
>> 2011/03/28 13:30:38 INFO  - jmeter.threads.JMeterThread: Thread started:
>> Stepping Thread Group 1-4
>> 2011/03/28 13:30:38 INFO  - jmeter.threads.JMeterThread: Thread started:
>> Stepping Thread Group 1-3
>> 2011/03/28 13:30:38 INFO  - jmeter.threads.JMeterThread: Thread started:
>> Stepping Thread Group 1-5
>> 2011/03/28 13:30:38 INFO  - jmeter.threads.JMeterThread: Thread started:
>> Stepping Thread Group 1-7
>> 2011/03/28 13:30:38 INFO  - jmeter.threads.JMeterThread: Thread started:
>> Stepping Thread Group 1-9
>> 2011/03/28 13:30:38 ERROR - jmeter.engine.StandardJMeterEngine: Uncaught
>> exception:  java.lang.OutOfMemoryError: unable to create new native thread
>>         at java.lang.Thread.start0(Native Method)
>>         at java.lang.Thread.start(Unknown Source)
>>         at
>>
> org.apache.jmeter.engine.StandardJMeterEngine.run(StandardJMeterEngine.java:
>> 484)
>>         at java.lang.Thread.run(Unknown Source)
>>
>> So an outofmemory exception is thrown almost immediately after starting
> the
>> tests... Does anyone have any idea what causes this?
>> It doesn't really seem to affect the test run but I want to make sure it
>> isn't.
>>
>> Thanks! CP
>>
>>
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>
>
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