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IV57462: CAA: "DEADMAN TIMER TRIGGERED" WITH SANCOMM AND SHUTDOWN OF NODE APPLIES TO AIX 7100-03

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

    IV57462

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2014-03-26

  • Closed date

    2014-04-01

  • Last modified date

    2016-05-10

Fix information

  • Fixed component name

    AIX V7.1

  • Fixed component ID

    5765H4000

Applicable component levels

  • R710 PSY U859720

       UP14/05/22 I 1000

PTF to Fileset Mapping



Document information

More support for: AIX Enterprise Edition

Software version: 710

Operating system(s): AIX

Reference #: IV57462

Modified date: 10 May 2016