OutOfMemoryError with many service endpoints
--------------------------------------------

                 Key: CXF-2756
                 URL: https://issues.apache.org/jira/browse/CXF-2756
             Project: CXF
          Issue Type: Bug
          Components: Bus
    Affects Versions: 2.2.5
         Environment: Windows 7 x64 Sun JDK 1.6.0_17-b04), Java HotSpot(TM) 
64-Bit Server VM (build 14.3-b01, mixed mod;
IBM J9 JDK 64bit IBM J9 VM (build 2.4, J2RE 1.6.0 IBM J9 2.4 AIX ppc64-64 
jvmap6460sr5
JBoss 5.1.0.GA + JBossWS-CXF 3.2.2.GA
            Reporter: Gregor B. Rosenauer


I am deploying an EAR in JBoss which exposes many (approx. 120) endpoints, each 
of those publish a simple WSDL (2 services with 1 parameter) - demo attached, 
if necessary I can add a private attachment with the real world EAR.
When invoking these service endpoints, CXF always scans the entire EAR and 
(re)builds the service endpoint registry.

Performance with many (10-20) concurrent service calls degrades and memory 
consumption increases steadily, ultimately leading to an OutOfMemoryException 
in JBoss. It seems the endpoints cannot be found in the cache and so the entire 
registry is rebuilt.

In a simple test it showed that simply displaying the service endpoints exposed 
WSDL is sufficient to trigger the problematic behaviour:
{code:title=JBoss server.log|borderStyle=solid}
2010-04-06 10:47:34,861 DEBUG 
[org.springframework.beans.factory.support.DefaultListableBeanFactory] Invoking 
init method  'publish' on bean with name 'Vvpvzfpr'
2010-04-06 10:47:34,862 INFO  
[org.apache.cxf.service.factory.ReflectionServiceFactoryBean] Creating Service 
{http://vvpvzfpr.vvp.ta2mig.itsv.at/}VvpvzfprService from class 
at.itsv.ta2mig.vvp.vvpvzfpr.IVvpvzfpr
2010-04-06 10:47:34,868 INFO  [org.apache.cxf.endpoint.ServerImpl] Setting the 
server's publish address to be 
http://127.0.0.1:8080/ta2mig-vvptest1-ear-ta2mig-vvptest1-service-BUILD/Vvpvzfpr
2010-04-06 10:47:34,871 INFO  
[org.apache.cxf.common.injection.ResourceInjector] failed to resolve resource 
at.itsv.ta2mig.vvp.vvpvzfpr.Vvpvzfpr/connectionFactory
2010-04-06 10:47:34,872 DEBUG 
[org.springframework.beans.factory.support.DefaultListableBeanFactory] Finished 
creating instance of bean 'Vvpvzfpr'
{code}

This is for every service at every call, please ignore the "failed to resolve 
resource ..." as the datasource is not available in the local test environment.

Metro does not show this behaviour and reacts very fast with minimum memory 
consumption, but we cannot easily switch the entire web service stack at this 
time and I don't believe CXF has such a problem with many service endpoints... 
however since even calling the WSDL from JBoss' web interface triggers the 
problem, the app cannot be blamed...

Memory analysis with Eclipse MAT shows that the class 
org.apache.cxf.common.util.CacheMap grows excessively large, will attach some 
screenshots (also tested with jVisualVM) and logs later.

Possibly related bugs:

Memory Leak in WSDLManagerImpl - SchemaCacheMap
CXF-1621 
Memory leak due to literal keys in WSDLDefinition map
CXF-1639
performance of repeated calls to jaxws.Service.createPort is poor, jaxb context 
is created every time
CXF-850


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