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From Luciano Andress Martini <777u...@gmail.com>
Subject Re: Java.lang.out.of.memory not clearly....
Date Mon, 30 Jan 2012 16:33:34 GMT
2012/1/30, Luciano Andress Martini <777user@gmail.com>:
> Pid i changed the configuration, like this:
>
> JAVA_OPTS="-Djava.awt.headless=true -Xmx1512m -XX:ParallelGCThreads=4
> -XX:+UseParNewGC -XX:MaxPermSize=1024M -XX:+UseConcMarkSweepGC
> -XX:+CMSClassUnloadingEnabled -XX:+HeapDumpOnOutOfMemoryError"
>
> The system is 64 bits + Java 64 bits, running in debian
> paravirtualized with Xen.
>
>
> 2012/1/30, David kerber <dckerber@verizon.net>:
>> On 1/30/2012 11:05 AM, Luciano Andress Martini wrote:
>>> 2012/1/30, Caldarale, Charles R<Chuck.Caldarale@unisys.com>:
>>>>> From: Luciano Andress Martini [mailto:777user@gmail.com]
>>>>> Subject: Re: Java.lang.out.of.memory not clearly....
>>>>
>>>>> Jeffrey im sorry, but i need to ask, my boss says that is impossible
>>>>> to be a problem in the software cause java unalocate objects
>>>>> automatically, is that true?
>>>>
>>>> A) Stop your top posting - it's incredibly annoying and makes people
>>>> much
>>>> less likely to help.
>>>>
>>>> B) Your boss is wrong.  Google for many examples of memory leaks in
>>>> Java.
>>>>
>>>>   - Chuck
>>>>
>>>>
>>>> THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE
>>>> PROPRIETARY
>>>> MATERIAL and is thus for use only by the intended recipient. If you
>>>> received
>>>> this in error, please contact the sender and delete the e-mail and its
>>>> attachments from all computers.
>>>>
>>>>
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>>>>
>>>
>>> Thank you and sorry Chuck.
>>> Jeffrey what is your opinion about this?
>>> The development team is using a software that "Draw" java code called
>>> developer, and do not programming in. Im a assembler/C programmer and
>>> don't have so much knowing about java.
>>
>> Java can have memory leaks just as easily as C can, but if the app is
>> standalone, it will release them when the app closes and the JRE shuts
>> down.
>>
>> I have killed tomcat more than once with memory leaks, so it's easy to
>> do.  I'm not the expert that Chuck and Mark T are, but here is my
>> understanding of what happens:  if the app is running under tomcat, the
>> JRE never shuts down since tomcat is using it.  That means the JRE can
>> not free up memory that your app has left allocated, as it would be able
>> to in a standalone app.  So your Tomcat app has to clean up after itself
>> because there is nothing else that can do so.
>>
>>
>>>
>>> But all the fault is falling back to me in the company.
>>
>> I know the feeling  :-/
>>
>>
>>
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>>
>>
>

Sorry the gmail is doing wrong with my messages =/

I changed the configuration like this:
JAVA_OPTS="-Djava.awt.headless=true -Xmx1512m -XX:ParallelGCThreads=4
-XX:+UseParNewGC -XX:MaxPermSize=1024M -XX:+UseConcMarkSweepGC
-XX:+CMSClassUnloadingEnabled -XX:+HeapDumpOnOutOfMemoryError"

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