Axis2 High memory usage, OutOfMemory exception
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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
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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