IBM Support

IV69860: JVM CRASHES WHILE INCORRECTLY ATTEMPTING TO USE SHARED CLASS CAC HE WHEN IT IS RUNNING WITHOUT -XSHARECLASSES OPTION

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APAR status

  • Closed as program error.

Error description

  • Error Message: A SIGSEGV/GPF is reported when application
    attempts to load class
    .
    Stack Trace: Native Stack
    Trace:com/ibm/oti/shared/SharedClassURLClasspathHelperImpl.store
    SharedClassImpl2com/ibm/oti/shared/SharedClassURLClasspathHelper
    Impl.storeSharedClasscom/ibm/oti/shared/SharedClassURLClasspathH
    elperImpl.storeSharedClassjava/net/URLClassLoader.defineClassjav
    a/net/URLClassLoader.access$400java/net/URLClassLoader$ClassFind
    er.run()
    .
    

Local fix

  • If the JVM is not launched with -Xshareclasses option then unset
    the system property "com.ibm.oti.shared.enabled", (or) Launch
    the JVM with shared class cache by adding -Xshareclasses option.
    

Problem summary

  • The problem is caused when the system property
    "com.ibm.oti.shared.enabled" is set to "true" but the JVM is not
    configured to run with shared class cache i.e. JVM is launched
    without -Xshareclasses option.
    

Problem conclusion

  • The JVM has been updated to avoid using system property
    "com.ibm.oti.shared.enabled" to determine if it is configured to
    use shared class cache or not.
    .
    This APAR will be fixed in the following Java Releases:
       7    SR9       (7.0.9.0)
       8    SR1       (8.0.1.0)
       6 R1 SR8 FP4   (6.1.8.4)
       7 R1 SR3       (7.1.3.0)
       6 SR16 FP4     (6.0.16.4)
    .
    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

    IV69860

  • 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

    2015-02-24

  • Closed date

    2015-02-24

  • Last modified date

    2015-04-22

  • 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

  • R270 PSY

       UP



Document information

More support for: Runtimes for Java Technology
Virtual Machine

Software version: 260

Reference #: IV69860

Modified date: 22 April 2015