I run into an issue lately with the jmap and jstack implementation of OpenJDK. Quite frankly – they didn’t work…
When running jmap -heap, I would get:
Exception in thread "main" java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at sun.tools.jmap.JMap.runTool(JMap.java:197) at sun.tools.jmap.JMap.main(JMap.java:128) Caused by: java.lang.RuntimeException: unknown CollectedHeap type : class sun.jvm.hotspot.gc_interface.CollectedHeap at sun.jvm.hotspot.tools.HeapSummary.run(HeapSummary.java:146) at sun.jvm.hotspot.tools.Tool.start(Tool.java:221) at sun.jvm.hotspot.tools.HeapSummary.main(HeapSummary.java:40) ... 6 more
When running jstack -F I would get:
java.lang.RuntimeException: Unable to deduce type of thread from address 0x00007fc980001000 (expected type JavaThread, CompilerThread, ServiceThread, JvmtiAgentThread, or SurrogateLockerThread) at sun.jvm.hotspot.runtime.Threads.createJavaThreadWrapper(Threads.java:162) at sun.jvm.hotspot.runtime.Threads.first(Threads.java:150) at sun.jvm.hotspot.runtime.DeadlockDetector.createThreadTable(DeadlockDetector.java:149) at sun.jvm.hotspot.runtime.DeadlockDetector.print(DeadlockDetector.java:56) at sun.jvm.hotspot.runtime.DeadlockDetector.print(DeadlockDetector.java:39) at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:52) at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45) at sun.jvm.hotspot.tools.JStack.run(JStack.java:60) at sun.jvm.hotspot.tools.Tool.start(Tool.java:221) at sun.jvm.hotspot.tools.JStack.main(JStack.java:86) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at sun.tools.jstack.JStack.runJStackTool(JStack.java:136) at sun.tools.jstack.JStack.main(JStack.java:102) Caused by: sun.jvm.hotspot.types.WrongTypeException: No suitable match for type of address 0x00007fc980001000 at sun.jvm.hotspot.runtime.InstanceConstructor.newWrongTypeException(InstanceConstructor.java:62) at sun.jvm.hotspot.runtime.VirtualConstructor.instantiateWrapperFor(VirtualConstructor.java:80) at sun.jvm.hotspot.runtime.Threads.createJavaThreadWrapper(Threads.java:158) ... 15 more Can't print deadlocks:Unable to deduce type of thread from address 0x00007fc980001000 (expected type JavaThread, CompilerThread, ServiceThread, JvmtiAgentThread, or SurrogateLockerThread)
The fix was simple (as some dear guys in the OpenJDK explained to me). Make sure you install openjdk-debuginfo package. That should fix it.