Taking Heapdump from running Java Process

jmap -dump:format=b,file=./heapdump.bin <pid of java process>
sudo jmap -dump:format=b,file=/opt/tmp/heapdump.bin 277199
277199: Unable to open socket file: target process not responding or HotSpot VM not loaded
The -F option can be used when the target process is not responding
Attaching to process ID 277199, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 25.292-b10
Dumping heap to ./heapdump.bin ...
Exception in thread "main" java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.tools.jmap.JMap.runTool(JMap.java:201)
at sun.tools.jmap.JMap.main(JMap.java:130)
Caused by: java.lang.InternalError: Metadata does not appear to be polymorphic
at sun.jvm.hotspot.types.basic.BasicTypeDataBase.findDynamicTypeForAddress(BasicTypeDataBase.java:278)
at sun.jvm.hotspot.runtime.VirtualBaseConstructor.instantiateWrapperFor(VirtualBaseConstructor.java:102)
at sun.jvm.hotspot.oops.Metadata.instantiateWrapperFor(Metadata.java:68)
at sun.jvm.hotspot.memory.DictionaryEntry.klass(DictionaryEntry.java:71)
at sun.jvm.hotspot.memory.Dictionary.classesDo(Dictionary.java:66)
at sun.jvm.hotspot.memory.SystemDictionary.classesDo(SystemDictionary.java:190)
at sun.jvm.hotspot.memory.SystemDictionary.allClassesDo(SystemDictionary.java:183)
at sun.jvm.hotspot.utilities.HeapHprofBinWriter.writeClasses(HeapHprofBinWriter.java:954)
at sun.jvm.hotspot.utilities.HeapHprofBinWriter.write(HeapHprofBinWriter.java:427)
at sun.jvm.hotspot.tools.HeapDumper.run(HeapDumper.java:62)
at sun.jvm.hotspot.tools.Tool.startInternal(Tool.java:260)
at sun.jvm.hotspot.tools.Tool.start(Tool.java:223)
at sun.jvm.hotspot.tools.Tool.execute(Tool.java:118)
at sun.jvm.hotspot.tools.HeapDumper.main(HeapDumper.java:83)
... 6 more
Dumping heap to /opt/<service_name>/heapdump.bin ...
Heap dump file created

--

--

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store