PM33959: S0C9 IN EZBIESTM +1E8 AFTER STATC COMMAND

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You can track all active APARs for this component.

APAR status

  • Closed as fixed if next.

Error description

  • An abend 0C9 can occur in the SNMP subagent when the
    undocumented STATC command is used to clear TCPIP statistics and
    no listener activity occurs between the time the STATC is issued
    and when SNMP attempts to use a time value stored in these
    fields.
    

Local fix

  • Do not use the undocumented function.  Do delta math on the
    fields instead of clearing them.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of the IBM Communications Server   *
    *                 for z/OS Version 1 Release(s) 10, 11, and 12 *
    *                 IP                                           *
    ****************************************************************
    * PROBLEM DESCRIPTION: Abend0C9 in EZBIESTM when dividing by   *
    *                      zero.  An undocumented modify command   *
    *                      to clear the TCP/IP stack statistics    *
    *                      resulted in a MIB object variable that  *
    *                      is used as a divisor to become zero.    *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Abend0C9 in EZBIESTM when dividing by zero.  An undocumented
    modify command to clear the TCP/IP stack statistics resulted in
    a MIB object variable that is used as a divisor to become zero.
    
    The SNMP subagent is active and a request for MIB object
    ibmMvsTcpListenerTableLastChange (1.3.6.1.4.1.2.6.19.2.2.7.33)
    causes routine sd_get_tcp_tbl to be called.  This routine
    calculates the time since the last TCP listener started or
    ended using the tcp_ListenLastChange value from the TCP/IP
    stack.
    An undocumented modify command for IBM internal testing use
    was issued and cleared the tcp_ListenLastChange value.  When
    this value was used as the divisor it resulted in the abend
    S0C9.
    +-------------------------------------------------------------+
    + Please check our Communications Server for OS/390 homepages +
    + for common networking tips and fixes.  The URL for these    +
    + homepages can be found in Informational APAR II11334.       +
    +-------------------------------------------------------------+
    

Problem conclusion

Temporary fix

Comments

  • This APAR is being closed FIN (Fixed If Next) with concurrence
    from the submitting customer. This means that a fix to this
    APAR is expected to be delivered from IBM in a release (if any)
    to be available within the next 36 months.
    
    This problem will be tracked as Feature F153236
    by Communications Server for z/OS Development.
    
    The solution for this APAR is included in
    CS for zOS Version 2 Release 1.
    

APAR Information

  • APAR number

    PM33959

  • Reported component name

    TCP/IP V3 MVS

  • Reported component ID

    5655HAL00

  • Reported release

    1A0

  • Status

    CLOSED FIN

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2011-03-02

  • Closed date

    2011-03-28

  • Last modified date

    2013-09-16

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

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

Fix information

Applicable component levels

  • R1A0 PSN

       UP

  • R1B0 PSN

       UP

  • R1C0 PSN

       UP



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Document information


More support for:

z/OS family

Software version:

1A0

Operating system(s):

z/OS

Reference #:

PM33959

Modified date:

2013-09-16

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