Starting 2 different Btrace processes in 1 server ran into infinite loop?

[todLiu]

BTrace stumbled here in a infinite loop? maybe due to the unsafe collection "weakhashmap", please have a look and fix it, thanks in advance!

at java.util.WeakHashMap.get(WeakHashMap.java:403)
at com.sun.btrace.runtime.ClassCache.getInfos(ClassCache.java:80)
at com.sun.btrace.runtime.ClassCache.get(ClassCache.java:66)
at com.sun.btrace.runtime.ClassCache.get(ClassCache.java:62)
at com.sun.btrace.runtime.ClassFilter.isSubTypeOf(ClassFilter.java:223)
at com.sun.btrace.runtime.BTraceProbeSupport.getApplicableHandlers(BTraceProbeSupport.java:128)
at com.sun.btrace.runtime.BTraceProbePersisted.getApplicableHandlers(BTraceProbePersisted.java:372)
at com.sun.btrace.runtime.Instrumentor.create(Instrumentor.java:83)
at com.sun.btrace.runtime.BTraceClassWriter.addInstrumentor(BTraceClassWriter.java:68)
at com.sun.btrace.runtime.BTraceTransformer.transform(BTraceTransformer.java:196)
at sun.instrument.TransformerManager.transform(TransformerManager.java:188)
at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:428)

[jbachorik]

Can you describe the steps leading to this such that they are easy to follow precisely? It is necessary for reproduction and debugging. Thanks!

[todLiu]

Please check the trace captured attached, Application launched multi-thread to process its business,meanwhile btrace jumps in and do reflection ,Sometimes the application runs into infinite loop . I really suspect the root cause is "WeakHashMap", we have packaged another jar to check if this issue will happen again.