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Date: Thu, 25 May 2006 13:44:30 +0000 (GMT+00:00)
From: "Subramanyam Ramanathan (JIRA)" <jira@apache.org>
To: axis-dev@ws.apache.org
Subject: [jira] Updated: (AXIS2-766) Axis2 High memory usage, OutOfMemory
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     [ http://issues.apache.org/jira/browse/AXIS2-766?page=all ]

Subramanyam Ramanathan updated AXIS2-766:
-----------------------------------------

    Attachment: test2.xml

XML file being posted to axis2 web service.

> Axis2 High memory usage, OutOfMemory exception
> ----------------------------------------------
>
>          Key: AXIS2-766
>          URL: http://issues.apache.org/jira/browse/AXIS2-766
>      Project: Apache Axis 2.0 (Axis2)
>         Type: Bug

>  Environment: Red Hat Enterprise Linux ES release 4
> Axis2 version 1.0 
> Tomcat 5.5.17 
> jdk 1.5.0_04 
>     Reporter: Subramanyam Ramanathan
>  Attachments: Axis2SampleDocLit.wsdl, Axis2SampleDocLitServiceSkeleton.java, PostXmlToAxis.java, SoapSender.java, test2.xml
>
> I have been trying out Axis 2.0 over the past week, with the configuration : 
> Axis2 version 1.0 
> Tomcat 5.5.17 
> jdk 1.5.0_04 
> I have tried using the sample "Axis2SampleDocLitService" that has been given. I generated the stubs and skeletons using the wsdl provided with the axis2 distribution (samples/wsdl/Axis2SampleDocLit.wsdl) ,  as shown in the user guide, using the xmlbeans option for data binding. I have also filled in the Skeleton class with the same code as given in the user guide.
> I have a http client which I use to post the xml request to the server, and I got proper responses when I tested it with the client.
> However, I have noticed that when I pump requests at a rapid rate, the memory usage keeps on increasing rapidly (checked using jmx console), in some cases ultimately leading to a jvm crash with an OutOfMemory Exception.  This was occurring when default mx(which is 64M) was used.
> I also tried setting the JVM mx option to 128M (-Xmx128M)  and ran the test again. However, the memory usage keeps increasing all the way till it reaches 128 Mb, too, where it again crashes if I continue pumping further. 
> If I stop pumping requests at around that time, and wait for around half an hour, I notice that the memory usage begins to reduce, and slowly come back to the original value (10M approx.)  upon forcing a GC. 
> I have also deployed axis1 on the same tomcat installation, with the intention of comparing performance. When I try the same test there, ie, pumping requests, I don't find any alarming memory increase.
> Why is so much memory being used, and why does it grow to fill however much memory is available ? Is it a memory leak, or is there any way I can limit the amount of memory being used ? The memory usage does come down, but it takes a very long time for this. This would surely affect the performance of any webservice I try to deploy with axis2, and it may even result in the service being unavailable because of a crash.

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