IV45074: JEXTRACT HANGS WHEN RUNNING AGAINST A LINUX CORE FILE

Subscribe to this APAR

By subscribing, you receive periodic emails alerting you to the status of the APAR, along with a link to the fix after it becomes available. You can track this item individually or track all items by product.

Notify me when this APAR changes.

Notify me when an APAR for this component changes.

APAR status

  • Closed as program error.

Error description

  • Error Message: When the jextract tool is run against a Linux
    core file it does not terminate.
    If a java stack trace is obtained from the jextract process by
    triggering a javacore then the stack trace for the main method
    will appear to remain the same. The GC History section will show
    that objects are being freed and indicate that the tool is doing
    work but comparing stack traces across several javacores will
    show no progress is made on the main thread.
    .
    Stack Trace: 3XMTHREADINFO3           Java callstack:
    4XESTACKTRACE                at
    com/ibm/dtfj/corereaders/ClosingFileReader.readFully(ClosingFile
    Reader.java:447(Compiled Code))
    4XESTACKTRACE                at
    com/ibm/dtfj/corereaders/ClosingFileReader.readInt(ClosingFileRe
    ader.java:385(Compiled Code))
    4XESTACKTRACE                at
    com/ibm/dtfj/corereaders/DumpReader.readInt(DumpReader.java:33(C
    ompiled Code))
    4XESTACKTRACE                at
    com/ibm/dtfj/corereaders/LittleEndianDumpReader.readInt(LittleEn
    dianDumpReader.java:26(Compiled Code))
    4XESTACKTRACE                at
    com/ibm/dtfj/corereaders/NewElfDump$ElfFile.readInt(NewElfDump.j
    ava:752(Compiled Code))
    4XESTACKTRACE                at
    com/ibm/dtfj/corereaders/NewElfDump$ElfFile.readNote(NewElfDump.
    java:701(Compiled Code))
    4XESTACKTRACE                at
    com/ibm/dtfj/corereaders/NewElfDump$ElfFile.readNotes(NewElfDump
    .java:695(Compiled Code))
    4XESTACKTRACE                at
    com/ibm/dtfj/corereaders/NewElfDump$ElfFile.readProgramHeader(Ne
    wElfDump.java:687)
    4XESTACKTRACE                at
    com/ibm/dtfj/corereaders/NewElfDump$ElfFile.readFile(NewElfDump.
    java:617)
    4XESTACKTRACE                at
    com/ibm/dtfj/corereaders/NewElfDump$Elf32File.<init>(NewElfDump.
    java:967)
    4XESTACKTRACE                at
    com/ibm/dtfj/corereaders/NewElfDump.readModules(NewElfDump.java:
    1219)
    4XESTACKTRACE                at
    com/ibm/dtfj/corereaders/NewElfDump.buildProcess(NewElfDump.java
    :1145)
    4XESTACKTRACE                at
    com/ibm/dtfj/corereaders/NewElfDump.readProcess(NewElfDump.java:
    1138)
    4XESTACKTRACE                at
    com/ibm/dtfj/corereaders/NewElfDump.extract(NewElfDump.java:1879
    )
    4XESTACKTRACE                at
    com/ibm/jvm/j9/dump/extract/Main.<init>(Main.java:430)
    4XESTACKTRACE                at
    com/ibm/jvm/j9/dump/extract/Main.main(Main.java:318)
    .
    

Local fix

Problem summary

  • The problem was caused when a core file is damaged or contains
    unexpected data.
    

Problem conclusion

  • This defect will be fixed in:
    7.0.0 SR5
    6.0.1 SR6
    6.0.0 SR14
    .
    The jextract tool has been updated with an additional validity
    check on the contents of the file that will prevent this
    unexpected data causing it not to terminate.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV45074

  • Reported component name

    J9 COMMON CODE

  • Reported component ID

    620700127

  • Reported release

    260

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-07-01

  • Closed date

    2013-07-01

  • Last modified date

    2013-07-26

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    J9 COMMON CODE

  • Fixed component ID

    620700127

Applicable component levels

  • R260 PSY

       UP

  • R600 PSY

       UP



Rate this page:

(0 users)Average rating

Document information


More support for:

Runtimes for Java Technology
Virtual Machine

Software version:

260

Reference #:

IV45074

Modified date:

2013-07-26

Translate my page

Machine Translation

Content navigation