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  1. JDK
  2. JDK-8163272

jhsdb jinfo cannot show system properties

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: P4
    • Resolution: Fixed
    • Affects Version/s: 9
    • Fix Version/s: 9
    • Component/s: hotspot
    • Labels:
    • Subcomponent:
    • Resolved In Build:
      b133

      Description

      I tried to get system properties via "jhsdb jinfo".
      However, it did not work as below:

      ----------------
      $ /usr/local/jdk-9/bin/jhsdb jinfo --pid 1002
      Attaching to process ID 1002, please wait...
      Debugger attached successfully.
      Server compiler detected.
      JVM version is 9-ea+129
      Java System Properties:

      java.lang.NullPointerException
              at sun.jvm.hotspot.utilities.ObjectReader.getHashtable(jdk.hotspot.agent@9-ea/ObjectReader.java:217)
              at sun.jvm.hotspot.utilities.ObjectReader.readInstance(jdk.hotspot.agent@9-ea/ObjectReader.java:247)
              at sun.jvm.hotspot.utilities.ObjectReader.readObject(jdk.hotspot.agent@9-ea/ObjectReader.java:105)
              at sun.jvm.hotspot.runtime.VM$2.doOop(jdk.hotspot.agent@9-ea/VM.java:940)
              at sun.jvm.hotspot.oops.InstanceKlass.visitField(jdk.hotspot.agent@9-ea/InstanceKlass.java:872)
              at sun.jvm.hotspot.oops.InstanceKlass.iterateStaticFieldsInternal(jdk.hotspot.agent@9-ea/InstanceKlass.java:572)
              at sun.jvm.hotspot.oops.InstanceKlass.iterateStaticFields(jdk.hotspot.agent@9-ea/InstanceKlass.java:560)
              at sun.jvm.hotspot.runtime.VM.readSystemProperties(jdk.hotspot.agent@9-ea/VM.java:935)
              at sun.jvm.hotspot.runtime.VM.getSystemProperties(jdk.hotspot.agent@9-ea/VM.java:928)
              at sun.jvm.hotspot.tools.SysPropsDumper.run(jdk.hotspot.agent@9-ea/SysPropsDumper.java:44)
              at sun.jvm.hotspot.tools.JInfo$1.run(jdk.hotspot.agent@9-ea/JInfo.java:80)
              at sun.jvm.hotspot.tools.JInfo.run(jdk.hotspot.agent@9-ea/JInfo.java:95)
              at sun.jvm.hotspot.tools.Tool.startInternal(jdk.hotspot.agent@9-ea/Tool.java:260)
              at sun.jvm.hotspot.tools.Tool.start(jdk.hotspot.agent@9-ea/Tool.java:223)
              at sun.jvm.hotspot.tools.Tool.execute(jdk.hotspot.agent@9-ea/Tool.java:118)
              at sun.jvm.hotspot.tools.JInfo.runWithArgs(jdk.hotspot.agent@9-ea/JInfo.java:139)
              at sun.jvm.hotspot.tools.JInfo.main(jdk.hotspot.agent@9-ea/JInfo.java:144)
              at sun.jvm.hotspot.SALauncher.runJINFO(jdk.hotspot.agent@9-ea/SALauncher.java:344)
              at sun.jvm.hotspot.SALauncher.main(jdk.hotspot.agent@9-ea/SALauncher.java:425)
      System Properties info not available!
      ----------------

      I think this is caused by JDK-8029891.
      JDK-8029891 changes that j.u.Properties stores properties to j.u.c.ConcurrentHashMap.
      ObjectReader should be adapted to this change.

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              Assignee:
              ysuenaga Yasumasa Suenaga
              Reporter:
              ysuenaga Yasumasa Suenaga
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                Created:
                Updated:
                Resolved: