-
Bug
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Resolution: Won't Fix
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P3
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6
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x86
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linux
FULL PRODUCT VERSION :
java version "1.6.0_02"
Java(TM) SE Runtime Environment (build 1.6.0_02-b05)
Java HotSpot(TM) Client VM (build 1.6.0_02-b05, mixed mode, sharing)
also tested with 1.6.0_01
ADDITIONAL OS VERSION INFORMATION :
Linux heffer.pirobase.de 2.6.17-13mdv #1 SMP Fri Mar 23 19:03:31 UTC 2007 i686 Intel(R) Pentium(R) D CPU 3.00GHz GNU/Linux
and Ubuntu 7.04
A DESCRIPTION OF THE PROBLEM :
jstack -m <pid> in jdk1.6 just throws a lot of NullPointerException instead of reporting something useful:
Attaching to process ID 30466, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 1.6.0_01-b06
Deadlock Detection:
No deadlocks found.
----------------- 30467 -----------------
java.lang.NullPointerException
at sun.jvm.hotspot.tools.PStack.printUnknown(PStack.java:207)
at sun.jvm.hotspot.tools.PStack.run(PStack.java:130)
at sun.jvm.hotspot.tools.PStack.run(PStack.java:36)
at sun.jvm.hotspot.tools.PStack.run(PStack.java:31)
at sun.jvm.hotspot.tools.JStack.run(JStack.java:43)
at sun.jvm.hotspot.tools.Tool.start(Tool.java:204)
at sun.jvm.hotspot.tools.JStack.main(JStack.java:69)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at sun.tools.jstack.JStack.runJStackTool(JStack.java:118)
at sun.tools.jstack.JStack.main(JStack.java:84)
...
the same was working in jdk1.5.0_07 (only 1.5 release I tested). I also tested with the last jdk7 snapshot:
java version "1.7.0-ea"
Java(TM) SE Runtime Environment (build 1.7.0-ea-b13)
Java HotSpot(TM) Client VM (build 1.7.0-ea-b13, mixed mode, sharing)
there it seems to work, at least some threads are dumped. But there I get a lot of these:
sun.jvm.hotspot.debugger.UnalignedAddressException: Trying to read at address: 0x466e3a6e with alignm ent: 4
at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1.checkAlignment(LinuxDebuggerLocal.java :181)
at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readCInteger(LinuxDebuggerLocal.java:469 )
at sun.jvm.hotspot.debugger.DebuggerBase.readAddressValue(DebuggerBase.java:442)
at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readAddress(LinuxDebuggerLocal.java:423)
at sun.jvm.hotspot.debugger.linux.LinuxAddress.getAddressAt(LinuxAddress.java:74)
at sun.jvm.hotspot.debugger.linux.x86.LinuxX86CFrame.sender(LinuxX86CFrame.java:60)
at sun.jvm.hotspot.tools.PStack.run(PStack.java:161)
at sun.jvm.hotspot.tools.PStack.run(PStack.java:53)
at sun.jvm.hotspot.tools.PStack.run(PStack.java:48)
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:624)
at sun.tools.jstack.JStack.runJStackTool(JStack.java:136)
at sun.tools.jstack.JStack.main(JStack.java:102)
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
call jstack -m on some pid with a java process
EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
a mixed thread dump
ACTUAL -
NullPointerException
ERROR MESSAGES/STACK TRACES THAT OCCUR :
see attachment
REPRODUCIBILITY :
This bug can be reproduced always.
Release Regression From : 5.0u12
The above release value was the last known release where this
bug was not reproducible. Since then there has been a regression.
java version "1.6.0_02"
Java(TM) SE Runtime Environment (build 1.6.0_02-b05)
Java HotSpot(TM) Client VM (build 1.6.0_02-b05, mixed mode, sharing)
also tested with 1.6.0_01
ADDITIONAL OS VERSION INFORMATION :
Linux heffer.pirobase.de 2.6.17-13mdv #1 SMP Fri Mar 23 19:03:31 UTC 2007 i686 Intel(R) Pentium(R) D CPU 3.00GHz GNU/Linux
and Ubuntu 7.04
A DESCRIPTION OF THE PROBLEM :
jstack -m <pid> in jdk1.6 just throws a lot of NullPointerException instead of reporting something useful:
Attaching to process ID 30466, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 1.6.0_01-b06
Deadlock Detection:
No deadlocks found.
----------------- 30467 -----------------
java.lang.NullPointerException
at sun.jvm.hotspot.tools.PStack.printUnknown(PStack.java:207)
at sun.jvm.hotspot.tools.PStack.run(PStack.java:130)
at sun.jvm.hotspot.tools.PStack.run(PStack.java:36)
at sun.jvm.hotspot.tools.PStack.run(PStack.java:31)
at sun.jvm.hotspot.tools.JStack.run(JStack.java:43)
at sun.jvm.hotspot.tools.Tool.start(Tool.java:204)
at sun.jvm.hotspot.tools.JStack.main(JStack.java:69)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at sun.tools.jstack.JStack.runJStackTool(JStack.java:118)
at sun.tools.jstack.JStack.main(JStack.java:84)
...
the same was working in jdk1.5.0_07 (only 1.5 release I tested). I also tested with the last jdk7 snapshot:
java version "1.7.0-ea"
Java(TM) SE Runtime Environment (build 1.7.0-ea-b13)
Java HotSpot(TM) Client VM (build 1.7.0-ea-b13, mixed mode, sharing)
there it seems to work, at least some threads are dumped. But there I get a lot of these:
sun.jvm.hotspot.debugger.UnalignedAddressException: Trying to read at address: 0x466e3a6e with alignm ent: 4
at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1.checkAlignment(LinuxDebuggerLocal.java :181)
at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readCInteger(LinuxDebuggerLocal.java:469 )
at sun.jvm.hotspot.debugger.DebuggerBase.readAddressValue(DebuggerBase.java:442)
at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readAddress(LinuxDebuggerLocal.java:423)
at sun.jvm.hotspot.debugger.linux.LinuxAddress.getAddressAt(LinuxAddress.java:74)
at sun.jvm.hotspot.debugger.linux.x86.LinuxX86CFrame.sender(LinuxX86CFrame.java:60)
at sun.jvm.hotspot.tools.PStack.run(PStack.java:161)
at sun.jvm.hotspot.tools.PStack.run(PStack.java:53)
at sun.jvm.hotspot.tools.PStack.run(PStack.java:48)
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:624)
at sun.tools.jstack.JStack.runJStackTool(JStack.java:136)
at sun.tools.jstack.JStack.main(JStack.java:102)
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
call jstack -m on some pid with a java process
EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
a mixed thread dump
ACTUAL -
NullPointerException
ERROR MESSAGES/STACK TRACES THAT OCCUR :
see attachment
REPRODUCIBILITY :
This bug can be reproduced always.
Release Regression From : 5.0u12
The above release value was the last known release where this
bug was not reproducible. Since then there has been a regression.
- relates to
-
JDK-6310967 SA: jstack -m produce failures in output
- Closed