[CXF-6458] CXF 3.1.0 memory leak (Tomcat)

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.1
• Component/s: Core
• Estimated Complexity: Unknown
• Assignee: Unassigned
• Reporter: neil walker
• Created: 11/Jun/15 20:04
• Updated: 14/Jun/18 09:08

Description

I have created a CXF project using wsdl2java, make no changes (i.e. blank project) I deploy it to Tomcat 7 or 8. As soon as I click 'stop', without even calling it, I am getting SEVERE errors from Tomcat regarding memory leaks and inability to close threads. Every time I start/stop I get an additional WebappClassLoader (I have done a memory dump and checked using Eclipse MAT) for the webapp and it only gets fixed when I restart tomcat. Tomcat also reports this using the 'test for leaks' button.

This originally happened on CXF2.7 so I upgraded to 3, I have also tried the very latest JAXB reference implementation.

The stack trace is as follows:

org.apache.cxf.workqueue.AutomaticWorkQueueImpl$AWQThreadFactory$1.run(Automati
cWorkQueueImpl.java:353)
java.lang.Thread.run(Thread.java:722)
11-Jun-2015 15:45:33.142 SEVERE [http-nio-8080-exec-2] org.apache.catalina.loade
r.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [MyAcces
sAPSServiceN] created a ThreadLocal with key of type [com.sun.xml.bind.v2.ClassF
actory$1] (value [com.sun.xml.bind.v2.ClassFactory$1@27765bfc]) and a value of t
ype [java.util.WeakHashMap] (value [{class org.apache.cxf.ws.addressing.Attribut
edURIType=java.lang.ref.WeakReference@4b9111a1}]) but failed to remove it when t
he web application was stopped. Threads are going to be renewed over time to try
and avoid a probable memory leak.
11-Jun-2015 15:45:33.143 SEVERE [http-nio-8080-exec-2] org.apache.catalina.loade
r.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [MyAcces
sAPSServiceN] created a ThreadLocal with key of type [com.sun.xml.bind.v2.ClassF
actory$1] (value [com.sun.xml.bind.v2.ClassFactory$1@27765bfc]) and a value of t
ype [java.util.WeakHashMap] (value [{class org.apache.cxf.ws.discovery.wsdl.Hell
oType=java.lang.ref.WeakReference@211c87c9, class javax.xml.ws.wsaddressing.W3CE
ndpointReference$Address=java.lang.ref.WeakReference@5816ae1a, class javax.xml.w
s.wsaddressing.W3CEndpointReference=java.lang.ref.WeakReference@39005a24, class
org.apache.cxf.ws.discovery.wsdl.ScopesType=java.lang.ref.WeakReference@461e0eb8
, class java.util.ArrayList=java.lang.ref.WeakReference@5f5875fe, class javax.xm
l.ws.wsaddressing.W3CEndpointReference$Elements=java.lang.ref.WeakReference@28aa
a799}]) but failed to remove it when the web application was stopped. Threads ar
e going to be renewed over time to try and avoid a probable memory leak.
11-Jun-2015 15:45:33.146 SEVERE [http-nio-8080-exec-2] org.apache.catalina.loade
r.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [MyAcces
sAPSServiceN] created a ThreadLocal with key of type [com.sun.xml.bind.v2.ClassF
actory$1] (value [com.sun.xml.bind.v2.ClassFactory$1@27765bfc]) and a value of t
ype [java.util.WeakHashMap] (value [{class org.apache.cxf.ws.addressing.Attribut
edURIType=java.lang.ref.WeakReference@5be142aa}]) but failed to remove it when t
he web application was stopped. Threads are going to be renewed over time to try
and avoid a probable memory leak.
11-Jun-2015 15:45:33.148 SEVERE [http-nio-8080-exec-2] org.apache.catalina.loade
r.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [MyAcces
sAPSServiceN] created a ThreadLocal with key of type [com.sun.xml.bind.v2.ClassF
actory$1] (value [com.sun.xml.bind.v2.ClassFactory$1@27765bfc]) and a value of t
ype [java.util.WeakHashMap] (value [{class javax.xml.ws.wsaddressing.W3CEndpoint
Reference$Address=java.lang.ref.WeakReference@21dfd606, class javax.xml.ws.wsadd
ressing.W3CEndpointReference=java.lang.ref.WeakReference@6e5c3549, class org.apa
che.cxf.ws.discovery.wsdl.ScopesType=java.lang.ref.WeakReference@67ae8439, class
java.util.ArrayList=java.lang.ref.WeakReference@726aef5c, class org.apache.cxf.
ws.discovery.wsdl.ByeType=java.lang.ref.WeakReference@4a88bbb3, class javax.xml.
ws.wsaddressing.W3CEndpointReference$Elements=java.lang.ref.WeakReference@56db0a
ff}]) but failed to remove it when the web application was stopped. Threads are
going to be renewed over time to try and avoid a probable memory leak.

Issue Links

• is duplicated by: CXF-6459 Memory leak (3.1.0) in Tomcat
• relates to: CAMEL-8972 Classloader leak reported in Apache tomcat