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IV58770: CAA: "DEADMAN TIMER TRIGGERED" WITH SANCOMM AND SHUTDOWN OF NODE APPLIES TO AIX 6100-09

A fix is available

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APAR status

  • Closed as program error.

Error description

  • - The shutdown of one node in a two node unicast cluster
    with SANComm configured may cause a kernel panic of the
    remaining node.
    
    - The error report log entry appears as follows:
    
    ---------------------
    LABEL:          KERNEL_PANIC
    . . .
    PANIC STRING
    Deadman timer triggered.
    . . .
    ---------------------
    

Local fix

Problem summary

  • System configured with ethernet, SANCOM and DPCOM may Panic
    with "Deadman timer triggered." panic string when ethernet
    is disabled and SANCOM is experiencing outgoing EOVERFLOW
    transmission errors.
    

Problem conclusion

  • Normally it is expected the cluster would fall back to
    DPCOM in such cases, but that was not happening because
    the SANCOM interface was not being marked DOWN even though
    it was experiencing transmission issues.
    
    Fixed monitoring of SANComm traffic such that if there is
    none, it is marked DOWN, leading to enablement of DPCOM.
    

Temporary fix

Comments

  • 6100-07 - use AIX APAR IV58896
    6100-08 - use AIX APAR IV58864
    6100-09 - use AIX APAR IV58770
    6100-09 - use AIX APAR IV58770
    6100-09 - use AIX APAR IV58770
    7100-01 - use AIX APAR IV59027
    7100-02 - use AIX APAR IV58954
    7100-03 - use AIX APAR IV57462
    7100-04 - use AIX APAR IV58879
    

APAR Information

  • APAR number

    IV58770

  • Reported component name

    AIX 610 STD EDI

  • Reported component ID

    5765G6200

  • Reported release

    610

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2014-04-04

  • Closed date

    2014-04-04

  • Last modified date

    2016-05-10

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

    IV57462

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

Fix information

  • Fixed component name

    AIX 610 STD EDI

  • Fixed component ID

    5765G6200

Applicable component levels

  • R610 PSY U856008

       UP14/05/21 I 1000

PTF to Fileset Mapping



Document information

More support for: AIX Standard Edition

Software version: 610

Operating system(s): AIX

Reference #: IV58770

Modified date: 10 May 2016