Thread BLOCKED using BS in Multi threads

Hi all,

 

I am having an issue when running multiple BS at the same type in
different threads in the same JVM.

 

Almost all the treads are getting into BLOCKED state due to some
synchronized code in Class.forName.

As a result the time of operation is much longer.

 

I have noticed that it happens mainly when the scripts are using
"source" to load other scripts.

 

Each threads have his own engine.

 

Any suggestion ?

 

Thanks

 

Fred

 

Thread dump:

 

"Scheduler-collector-SnmpCollector(MC.CA-30.4.31.162
[248]-0:0:0:0:0:0:0:0 [64]" prio=3 tid=0x012aa400 nid=0x4c waiting for
monitor entry [0x9457e000]

   java.lang.Thread.State: BLOCKED (on object monitor)

        at java.lang.Class.forName0(Native Method)

        at java.lang.Class.forName(Class.java:169)

        at bsh.BshClassManager.plainClassForName(Unknown Source)

        at bsh.classpath.ClassManagerImpl.classForName(Unknown Source)

        at bsh.NameSpace.classForName(Unknown Source)

        at bsh.NameSpace.getImportedClassImpl(Unknown Source)

        at bsh.NameSpace.getClassImpl(Unknown Source)

        at bsh.NameSpace.getClass(Unknown Source)

        at bsh.NameSpace.getClass(Unknown Source)

        at bsh.Name.toClass(Unknown Source)

        - locked <0xe8988700> (a bsh.Name)

        at bsh.BSHAmbiguousName.toClass(Unknown Source)

        at bsh.BSHType.getType(Unknown Source)

        at bsh.BSHTypedVariableDeclaration.eval(Unknown Source)

        at bsh.BSHBlock.evalBlock(Unknown Source)

        at bsh.BSHBlock.eval(Unknown Source)

        at bsh.BSHBlock.eval(Unknown Source)

        at bsh.BSHTryStatement.eval(Unknown Source)

        at bsh.Interpreter.eval(Unknown Source)

        at bsh.Interpreter.eval(Unknown Source)

        at bsh.Interpreter.eval(Unknown Source)

        at bsh.util.BeanShellBSFEngine.eval(Unknown Source)

        at org.apache.bsf.BSFManager$5.run(Unknown Source)

        at java.security.AccessController.doPrivileged(Native Method)

        at org.apache.bsf.BSFManager.eval(Unknown Source)

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