[ mx4j-Bugs-1176891 ] ConcurrentModificationException in DefaultMBeanRepository

Bugs item #1176891, was opened at 2005-04-05 10:48
Message generated for change (Comment added) made by simonebordet
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=450647&aid=1176891&group_id=47745

Category: JMX implementation
>Group: Release 3.0.1
>Status: Closed
>Resolution: Duplicate
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
>Assigned to: Simone Bordet (simonebordet)
Summary: ConcurrentModificationException in DefaultMBeanRepository

Initial Comment:
Using Tomcat 5.0.5 I got the following MX4J stacktrace:
5-apr-2005 10:42:26
org.apache.coyote.tomcat5.MapperListener init
WARNING: Error registering contexts
java.util.ConcurrentModificationException
	at
java.util.HashMap$HashIterator.nextEntry(HashMap.java:782)
	at java.util.HashMap$EntryIterator.next(HashMap.java:824)
	at java.util.HashMap.putAllForCreate(HashMap.java:424)
	at java.util.HashMap.clone(HashMap.java:656)
	at
mx4j.server.DefaultMBeanRepository.clone(DefaultMBeanRepository.java:56)
	at
mx4j.server.MBeanServerImpl.findMBeansByPattern(MBeanServerImpl.java:1603)
	at
mx4j.server.MBeanServerImpl.queryObjectNames(MBeanServerImpl.java:1568)
	at
mx4j.server.MBeanServerImpl.queryMBeans(MBeanServerImpl.java:1512)
	at
org.apache.coyote.tomcat5.MapperListener.init(MapperListener.java:136)
	at
org.apache.coyote.tomcat5.CoyoteConnector.start(CoyoteConnector.java:1510)
	at
org.apache.catalina.core.StandardService.start(StandardService.java:485)
	at
org.apache.catalina.core.StandardServer.start(StandardServer.java:2298)
	at
org.apache.catalina.startup.Catalina.start(Catalina.java:556)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
Method)
	at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:324)
	at
org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:284)
	at
org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:422)
5-apr-2005 10:42:26
org.apache.catalina.startup.Catalina start
INFO: Server startup in 41172 ms


Looks like the clone() method needs some
synchronization. Just my $0.05

----------------------------------------------------------------------

>Comment By: Simone Bordet (simonebordet)
Date: 2005-04-05 16:28

Message:
Logged In: YES 
user_id=1170988

This bug was closed long time ago, see bug #1111695 and others.
Please update the $TOMCAT/bin/jmx.jar to the latest MX4J
version.
Rename mx4j.jar bundled with the latest MX4J distribution
into jmx.jar in the $TOMCAT/bin directory.
Tomcat 5 uses a very old release.

----------------------------------------------------------------------

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