Hello Jung,
Thanks for your insights. Learning some new stuff about Java every day ;)
I've read this nice blog -
http://www.talkingtree.com/blog/index.cfm/2006/4/28/Understanding-HotSpot-in-Plain-English
(
UNDERSTANDING HOTSPOT IN PLAIN
ENGLISH<http://www.talkingtree.com/blog/index.cfm/2006/4/28/Understanding-HotSpot-in-Plain-English>
)
Now I can see how to avoid those HotSpot compilation errors and eventual JVM
crashes.
I could use -Xint option to force "interpretedmode execution only"
like this:
# cat /srv/tomcat/bin/setenv.sh
export JAVA_HOME=/srv/jdk
export PATH="${PATH}:${JAVA_HOME}/bin/"
CATALINA_OPTS="-Xint -Xms512m -Xmx1024m -XX:MaxPermSize=512m $JAVA_OPTS
-Djava.awt.headless=true "
What are you saying?
Am I right?
Best Regards,
Leon Kolchinsky
On Thu, May 27, 2010 at 00:38, Rainer Jung <rainer.j...@kippdata.de> wrote:
> On 26.05.2010 14:49, Caldarale, Charles R wrote:
>
>> From: Leon Kolchinsky [mailto:lkolc...@gmail.com]
>>> Subject: Tomcat died on "java.lang.OutOfMemoryError: requested
>>> 2147483664 bytes for Chunk::new. Out of swap space?" message
>>>
>>> Yesterday I've got this error in catalina.out and Tomcat died (I'm
>>> attaching hs_err_pid5460.log file):
>>>
>>
>> This is not a Tomcat error - it's a bug in the JVM. The C2 (server)
>> compiler is requesting an extremely large expansion of the C (not Java)
>> heap. You can try increasing the swap space to see if that's a viable
>> workaround, but you really should do this:
>>
>> # If you would like to submit a bug report, please visit:
>>> # http://java.sun.com/webapps/bugreport/crash.jsp
>>>
>>
>> The current JVM version is 6u20, so you might want to try running with
>> that before filing a bug report or expanding the swap file.
>>
>
> If we stick to the theory, that it is actually the Hot Spot compiler, which
> demands the memory, one could also try to work around the issue.
>
> Option 1: Use the client Hot Sopt compiler (Add "-client" when starting the
> JVM). It could help,
>
> Option 2: Disable the Hot Spot compilation for the class and method that
> resulted in the crash:
>
> Current CompileTask:
>> C2:4743 !
>> org.apache.velocity.runtime.directive.Foreach.render(Lorg/apache/velocity/context/InternalContextAdapter;Ljava/io/Writer;Lorg/apache/velocity/runtime/parser/node/Node;)Z
>> (514 bytes)
>>
>
> To do this, you need to create a file named ".hotspot_compiler" in the
> working directory of your Tomcat. You would put a line like that into the
> file:
>
> exclude org/apache/velocity/runtime/directive/Foreach render
>
> Some more info about that is contained in
>
>
> http://java.sun.com/javase/6/webnotes/trouble/TSG-VM/html/crashes.html#gbyzd
>
> An alternative is adding
> -XX:CompileCommand=exclude,org/apache/velocity/runtime/directive/Foreach,render
>
> to the command line.
>
> See also
>
> http://forums.sun.com/thread.jspa?threadID=417123
>
> http://blogs.sun.com/javawithjiva/entry/hotspotrc_and_hotspot_compiler
>
> If you want to follow the Hot Spot compilation, you can also add
> "-XX:-PrintCompilation".
>
> Regards,
>
> Rainer
>
>
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