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From "Charith Dhanushka Wickramarachchi (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AXIS2-5203) JAX-WS Message Receiver Adds a new URL class loader to TCCL per each request.
Date Tue, 29 Nov 2011 03:57:40 GMT

    [ https://issues.apache.org/jira/browse/AXIS2-5203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13159070#comment-13159070
] 

Charith Dhanushka Wickramarachchi commented on AXIS2-5203:
----------------------------------------------------------

Hi Andreas, 

Can you please Elaborate on your statement a little bit as it is not clear to me ? (Basically
your comment does not give any clear reasoning for your clams) 

Let me clarify what i have done. 

In Axiom (StaXUtils) it keeps a cache of XMLOutputFactories in a map per CL where it is in
this case TCCL. and by default caching is enabled. So i think idea was to avoid creation of
 XMLOutputFactory per each request which is a costly operation. (I'll start a mail thread
on this and post the profile data i have.).


But in current JAXWSMessageReceiver it creates and adds a new CL and set it as TCCL per each
request which cases Axiom to create a new XMLOutputFactory per each request. And as they are
cached this may cause OOM.

So in this case i m going to avoid this by using the same class loader per service.May be
we can discuss and improve the patch. 


@Amila 
I'll will look at how normal services behave and see whether this issue is there in that services
too and keep this thread posted. 

thanks,
Charith



                
> JAX-WS Message Receiver Adds a new URL class loader to TCCL per each request.
> -----------------------------------------------------------------------------
>
>                 Key: AXIS2-5203
>                 URL: https://issues.apache.org/jira/browse/AXIS2-5203
>             Project: Axis2
>          Issue Type: Improvement
>          Components: jaxws
>         Environment: any
>            Reporter: Charith Dhanushka Wickramarachchi
>            Priority: Critical
>         Attachments: AXIS2-5203.diff
>
>
> In Current JAX-WS Message Receiver its adds a new URL class Loader instance as TCCL for
each request. This becomes a major performance hit as it cause to create XMLOutputFactory
at Axiom level for each response from the server.
> And also this may cause OOM situation since at AXIOM level it cache the XMLOutput factories
per class Loader by default. So in this case the Hash map entries that's used for this  cache
will get accumulated.
> thanks,
> Charith 

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