IBM Support

IZ72595: SYSTEM HANG DUE TO SNASLIM MESSAGE ROUTING LOOP

 

APAR status

  • Closed as program error.

Error description

  • Communications Server for AIX, Version 6.3
    ------------------------------------------
    The unix system is unresponsive or slow, and sna commands hang.
    The snaslim process is running at or near 100% CPU usage.

Local fix

  • Disable central logging in communications server.

Problem summary

  • * USERS AFFECTED:
    * All users of a multiple server domain when central logging
    * is enabled.
    *
    * PROBLEM DESCRIPTION:
    * Hang when snaslim process is looping taking CPU or is
    * killed by the linux out of memory handler (oom-killer).
    *
    * PROBLEM SUMMARY:
    * Analysis of gcore of the snaslim process indicates that it
    * is stuck in a loop routing a message between multiple systems.

Problem conclusion

  • Code has been modified to prevent ackowledgements of log
    messages being routed between servers when they have got out of
    sync with the location of a client.

Temporary fix

Comments

APAR Information

  • APAR number

    IZ72595

  • Reported component name

    CS AIX V6.X

  • Reported component ID

    5765E5100

  • Reported release

    631

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-03-10

  • Closed date

    2010-04-08

  • Last modified date

    2010-04-08

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

    LI75302

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

Fix information

  • Fixed component name

    CS AIX V6.X

  • Fixed component ID

    5765E5100

Applicable component levels

  • R631 PSY

       UP

  • R640 PSY

       UP

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Document Information

Modified date:
08 April 2010