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IV68689: CRASH WHILE WRITING A JAVACORE DUMP, WHEN RUNNING A LARGE NUMBER OF JAVA THREADS

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Error Message: After a Java dump is triggered, the JVM issues a
    JVMDUMP032I "JVM requested Java dump" message, followed by a
    crash and JVM termination. The Java dump produced is truncated.
    .
    Stack Trace: #0  0x00007ff0017d8aeb in insertNode () from
    ./var/app/was70025/WebSphere/70/java/jre/lib/amd64/compressedref
    s/libj9dmp24.so#1  0x00007ff0017d8b77 in insertNode () from
    ./var/app/was70025/WebSphere/70/java/jre/lib/amd64/compressedref
    s/libj9dmp24.so#2  0x00007ff0017d8b77 in insertNode () from
    ./var/app/was70025/WebSphere/70/java/jre/lib/amd64/compressedref
    s/libj9dmp24.so#3  0x00007ff0017d8b77 in insertNode () from
    ./var/app/was70025/WebSphere/70/java/jre/lib/amd64/compressedref
    s/libj9dmp24.so#4  0x00007ff0017d8b77 in insertNode () from
    ./var/app/was70025/WebSphere/70/java/jre/lib/amd64/compressedref
    s/libj9dmp24.so#5  0x00007ff0017d8b77 in insertNode () from
    ./var/app/was70025/WebSphere/70/java/jre/lib/amd64/compressedref
    s/libj9dmp24.so#6  0x00007ff0017d8b77 in insertNode () from
    ./var/app/was70025/WebSphere/70/java/jre/lib/amd64/compressedref
    s/libj9dmp24.so#7  0x00007ff0017d8b77 in insertNode () from
    ./var/app/was70025/WebSphere/70/java/jre/lib/amd64/compressedref
    s/libj9dmp24.so#8  0x00007ff0017d8318 in avl_insert () from
    ./var/app/was70025/WebSphere/70/java/jre/lib/amd64/compressedref
    s/libj9dmp24.so#9  0x00007ff0017cf37f in
    JavaCoreDumpWriter::writeThreadSection() from
    ./var/app/was70025/WebSphere/70/java/jre/lib/amd64/compressedref
    s/libj9dmp24.so
    .
    The Java application is running a large number of Java threads
    (typically 4,000 to 5,000).
    

Local fix

  • Disable Java dumps using the command line option
    -Xdump:java:none.
    

Problem summary

  • The problem is caused when the JVM is running a large number of
    Java threads and a Java dump is triggered.
    

Problem conclusion

  • The JVM has been updated to prevent the crash from occurring. If
    the JVM is running a large number of Java threads (typically
    4,000 or more), the amount of information collected and written
    to the Java dump for each thread is reduced by omitting the
    native stack.
    .
    This APAR will be fixed in the following Java Releases:
       6    SR16 FP4  (6.0.16.4)
       6 R1 SR8 FP4   (6.1.8.4)
       7 R1 SR3       (7.1.3.0)
       8    SR1       (8.0.1.0)
       7    SR9       (7.0.9.0)
    .
    Contact your IBM Product's Service Team for these Service
    Refreshes and Fix Packs.
    For those running stand-alone, information about the Service
    Refreshes and Fix Packs can be found at:
               https://www.ibm.com/developerworks/java/jdk/
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV68689

  • Reported component name

    J9 COMMON CODE

  • Reported component ID

    620700127

  • Reported release

    600

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2015-01-16

  • Closed date

    2015-01-30

  • Last modified date

    2015-03-13

  • 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

  • R600 PSY

       UP

  • R260 PSY

       UP

  • R270 PSY

       UP



Document information

More support for: Runtimes for Java Technology
Virtual Machine

Software version: 6.0

Reference #: IV68689

Modified date: 13 March 2015