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IV81845: THE IFSTAT DAEMON BECOMES UNRESPONSIVE ON AIX.

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • The ifstat daemon becomes unresponsive due to an incomplete
    response of the api perfstat_netinterface.
    
    The UNIX OS Agent is composed by 7 processes: kuxagent,
    stat_daemon, ifstat, kuxdstat (iostat on AIX), kux_vmstat, and
    nfs_stat and (mount_stat - 6.23 onwards)
    
    The ifstat process is spawned by the stat_daemon and is
    responsible for collecting every 30s the metrics for the
    following attribute group: UNIXNET
    
    Details:
    Gather logs with the following trace in lz.ini
    KBB_RAS1=ERROR (UNIT:KUX ALL) (UNIT:CPU ALL) (UNIT:stat_daemon
    ALL) (UNIT:ifstat ALL)
    DEBUG_PURPOSE_ONLY=TRUE
    
    The problem occurs because:
    1) the first call to perfstat_netinterface replies with 7
    interfaces
    2) the first call to perfstat_netinterface (to get the data)
    replies with ONLY 2 interfaces.
    
    So there is a clear mistmatch, which causes the issue.
    
    NOTE: The numbers may be different in each environment. The
    above example was recorded in the problem.
    
    Log entries: <hostname>_ux_ifstat_<timestamp>-01.log
    
    (56CF1C43.0001-1:ifstat-bsd.cpp,476,"main") 7 interfaces found
    
    between TWO messages of the same type, you can count the
    occurrences of the following message
    (56CF1C43.0025-1:ifstat-bsd.cpp,621,"main") name:
    
    In this case it was just 2 instead of 7.
    

Local fix

Problem summary

  • Problem Summary: Monitoring Agent for UNIX OS becomes
    unresponsive on AIX due to an incomplete response of the AIX api
    perfstat_netinterface
    
    Problem Conclusion: The ifstat daemon has been fixed to manage
    the unexpected behavior of the AIX api perfstat_netinterface
    

Problem conclusion

  • The fix for this APAR is included in the following maintenance
    vehicle:
    
       | fix pack | 6.3.0-TIV-ITM-FP0007 |
       | interim fix | 6.3.0.4-TIV-ITM_UNIX-IF0004 |
       | interim fix | 6.3.0.5-TIV-ITM_UNIX-IF0005 |
       | interim fix | 6.3.0.5-TIV-ITM_UNIX-IF0006 |
       | interim fix | 6.3.0.5-TIV-ITM_UNIX-IF0007 |
       | interim fix | 6.3.0.6-TIV-ITM_UNIX-IF0001 |
    
    Note: Search the IBM technical support web site for maintenance
    package availability.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV81845

  • Reported component name

    ITM AGENT UNIX

  • Reported component ID

    5724C040U

  • Reported release

    630

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-02-25

  • Closed date

    2016-04-15

  • Last modified date

    2018-05-11

  • 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

    ITM AGENT UNIX

  • Fixed component ID

    5724C040U

Applicable component levels

  • R630 PSY

       UP

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Document Information

Modified date:
11 May 2018