[ mx4j-Bugs-739789 ] BCEL error registering MBean

Bugs item #739789, was opened at 2003-05-19 03:38
Message generated for change (Comment added) made by nobody
You can respond by visiting: 
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Category: JMX implementation
Group: None
Status: Closed
Resolution: Works For Me
Priority: 5
Submitted By: Peter Brant (pbrant)
Assigned to: Simone Bordet (biorn_steedom)
Summary: BCEL error registering MBean

Initial Comment:
BCEL apparently generates invalid bytecode (stack 
trace is below).  The problem occurs quite rarely (but 
has happened more than once).  It would seem to be a 
multi-threading problem in mx4j or BCEL, but beyond 
that I don't have much information to offer.

java.lang.ClassFormatError: Invalid method signature: 
(Ljava/lang/Object;)Z
        at 
org.apache.bcel.generic.Type.getArgumentTypes
(Type.java:225)
        at 
org.apache.bcel.generic.InvokeInstruction.consumeStac
k(InvokeInstruction.java:99)
        at 
org.apache.bcel.generic.MethodGen.getMaxStack
(MethodGen.java:824)
        at 
org.apache.bcel.generic.MethodGen.setMaxStack
(MethodGen.java:717)
        at 
mx4j.server.BCELMBeanInvoker.createInvokeImpl
(BCELMBeanInvoker.java:187)
        at mx4j.server.BCELMBeanInvoker.create
(BCELMBeanInvoker.java:114)
        at mx4j.server.MBeanIntrospector.createInvoker
(MBeanIntrospector.java:537)
        at 
mx4j.server.MBeanIntrospector.introspectType11
(MBeanIntrospector.java:225)
        at mx4j.server.MBeanIntrospector.introspectType
(MBeanIntrospector.java:194)
        at mx4j.server.MBeanIntrospector.introspect
(MBeanIntrospector.java:94)
        at mx4j.server.MBeanServerImpl.registerImpl
(MBeanServerImpl.java:526)
        at mx4j.server.MBeanServerImpl.registerMBean
(MBeanServerImpl.java:519)
        at 
us.wi.state.courts.ccap.wcca2.cache.CacheManager.get
CacheManager(CacheManager.java:96)
        at 
us.wi.state.courts.ccap.wcca2.GlobalConstants.<clinit>
(GlobalConstants.java:25)


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

Comment By: Nobody/Anonymous (nobody)
Date: 2003-11-04 05:16

Message:
Logged In: NO 

Hello,

we have same problem. 

It happens only on multiprocessor platform and never on 
standard single CPU.

Stacktrace is almost the same

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

Comment By: Simone Bordet (biorn_steedom)
Date: 2003-08-26 06:03

Message:
Logged In: YES 
user_id=128193

Could not reproduce the bug.

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

Comment By: Peter Brant (pbrant)
Date: 2003-05-19 09:49

Message:
Logged In: YES 
user_id=320675

It's a bit hard to generalize because it's only happened twice 
in the last 4-5 months (although both times on the same 
MBean).

I'm afraid the BCEL version isn't entirely clear.  We're using 
the one bundled with Xalan/XSLTC and there's no indication 
what version they're using in the source download.  Is there 
one you recommend? 5.1?

The management interface of said MBean is appended.  It 
doesn't have a method like the one you describe.

public interface CacheMonitorMBean
{
	public static final String OBJECT_NAME_BASE =
		"Monitor:type=cacheMonitor,cacheId=";
		
	public static final String MONITOR_TYPE 
= "cacheMonitor";

	public String getCacheId();
	public int getSize();
	public int getMigratedSize();
}

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

Comment By: Simone Bordet (biorn_steedom)
Date: 2003-05-19 09:28

Message:
Logged In: YES 
user_id=128193

Does it always happen with MBeans that have a 

public boolean 
someMethod(Object[] arg)

in the management interface, or it 
seems to you that it does not depend on the management interface 
?

Which BCEL version do you use ?

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

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