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LI73705: IN LINUX DB2SYSC CRASH (SIGNAL #11) DOES NOT CREATE CORE FILE EVENTHOUGH ULIMIT -C UNLIMITED.

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • In Linux db2sysc crash (Signal #11) does not create core file
    eventhough ulimit -c unlimited.
    
    Manually doing kill -11 twice against db2sys PID does not create
    core file. However it does with db2agent.
    

Local fix

  • A workaround is to set suid_dumpable.
    
    # The suid_dumpable control file is found in different places
    ....
    
    if [ -e /proc/sys/kernel/suid_dumpable ] ; then
       echo 1 > /proc/sys/kernel/suid_dumpable
    else
       echo 1 > /proc/sys/fs/suid_dumpable
    
    NOTE that value of "1" means that the core is dumped by the
    current user. "2" is more restrictive, and allows only root to
    read the file. We use "1" in our prctl() call (which can be
    viewed as a security issue)
    To make the change permanent, add the following to
    /etc/sysctl.conf
    
    # Allow suid programs to dump core
    fs.suid_dumpable = 1
    

Problem summary

  • IN LINUX DB2SYSC CRASH (SIGNAL #11) DOES NOT CREATE CORE FILE
    EVENTHOUGH ULIMIT -C UNLIMITED.
    

Problem conclusion

  • Problem was first Fixed in 9.5 Fixpak 3
    

Temporary fix

Comments

APAR Information

  • APAR number

    LI73705

  • Reported component name

    DB2 UDE ESE LIN

  • Reported component ID

    5765F4104

  • Reported release

    950

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2008-08-12

  • Closed date

    2009-04-23

  • Last modified date

    2009-04-23

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

    LI73186

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

Fix information

  • Fixed component name

    DB2 UDE ESE LIN

  • Fixed component ID

    5765F4104

Applicable component levels

  • R950 PSY

       UP

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Document Information

Modified date:
23 April 2009