JVM core dump and attach to jsadebugd problem
Hi everyone,
I was looking for a way to dump the complete state of a JVM (all runing threads, objects, ...) and afterwards to analize the dumped data. I have found a thread(http://forum.java.sun.com/thread.jspa?threadID=735052) here in the forums with some explainations how this could be done using the Java 2 sdk 1.5.0 - troubleshooting tools (http://java.sun.com/j2se/1.5.0/docs/tooldocs/experimentaltools.html).
I've made a small application, which starts a thread and just prints out continously some messages to the console.
After that I attached with gdb to the running process as described, and generated a core file.
Unfortunatelly on calling jdsadebugd with the core dump it throws the following exception:
jsadebugd /..../jdk1.5.0_07/bin/java core.18294 DebServ
Attaching to core core.18294 from executable /.../jdk1.5.0_07/bin/java and starting RMI services, please wait...
Error attaching to core file or starting server: sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the core file
at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.attach0(Native Method)
at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.attach(LinuxDebuggerLocal.java:258)
at sun.jvm.hotspot.HotSpotAgent.attachDebugger(HotSpotAgent.java:624)
at sun.jvm.hotspot.HotSpotAgent.setupDebuggerLinux(HotSpotAgent.java:610)
at sun.jvm.hotspot.HotSpotAgent.setupDebugger(HotSpotAgent.java:323)
at sun.jvm.hotspot.HotSpotAgent.go(HotSpotAgent.java:298)
at sun.jvm.hotspot.HotSpotAgent.startServer(HotSpotAgent.java:234)
at sun.jvm.hotspot.DebugServer.run(DebugServer.java:94)
at sun.jvm.hotspot.DebugServer.main(DebugServer.java:29)
at sun.jvm.hotspot.jdi.SADebugServer.main(SADebugServer.java:46)
Even if I try to print the shared objects mapping with jmap it fails with the following message:
jmap /.../jdk1.5.0_07/bin/java core.18294
Attaching to core core.18294 from executable /.../jdk1.5.0_07/bin/java, please wait...
Error attaching to core file: Can't attach to the core file
Does anyone have an idea what goes wrong here?
