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IV71769: CRASH ON REMOTE NODE WHEN MKLV RUN ON CONCURRENT VG APPLIES TO AIX 7100-03

A fix is available

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APAR status

  • Closed as program error.

Error description

  • In a clustered lvm environment, when one node is
    running 7100-03-04, and other node(s) are at prior
    levels...
    Running mklv on one of the nodes at a prior level
    will cause the 7100-03-04 system to crash with
    this stack:
    KDB(0)> f
    pvthread+014100 STACK:
    Ý05C6E56C¨hd_nearby+00032C (0000000000006C75, F1000A01C0AF0E88,
    0000000000000000, 00000000000363A8, 0000000000006C75 Ý??¨)
    Ý05C6828C¨hd_parallel_read+00020C (??, ??, ??)
    ...
    .
    This is because the 7100-03-04 node mis-interprets a structure
    passed to it from the node at a prior level, which very likely
    leads to a crash when I/O occurs at a later stage in the mklv
    process.
    

Local fix

  • To avoid crash make sure nodes in cluster are at the same
    aix release level.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:
    * Systems running the 7100-03 Technology Level with
    * bos.clvm.enh at 7.1.3.30
    ****************************************************************
    * PROBLEM DESCRIPTION:
    * In a clustered lvm environment, when one node is
    * running 7100-03-04, and other node(s) are at prior
    * levels...
    * Running mklv on one of the nodes at a prior level
    * will cause the 7100-03-04 system to crash with
    * this stack:
    * KDB(0)> f
    * pvthread+014100 STACK:
    *  05C6E56C hd_nearby+00032C (0000000000006C75, F1000A01C0AF0E88
    ,* 0000000000000000, 00000000000363A8, 0000000000006C75  ?? )
    *  05C6828C hd_parallel_read+00020C (??, ??, ??)
    * ...
    * .
    * This is because the 7100-03-04 node mis-interprets a structure
    * passed to it from the node at a prior level, which very likely
    * leads to a crash when I/O occurs at a later stage in the mklv
    * process.
    ****************************************************************
    * RECOMMENDATION:
    * Install APAR IV71769.
    ****************************************************************
    

Problem conclusion

  • Correct the data structure used to pass information between
    nodes so crash cannot occur even in a mixed level environment.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV71769

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    YesPE

  • HIPER

    NoHIPER

  • Submitted date

    2015-04-01

  • Closed date

    2015-04-02

  • Last modified date

    2016-05-11

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

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

    IV71919

Fix information

  • Fixed component name

    AIX V7.1

  • Fixed component ID

    5765H4000

Applicable component levels

  • R710 PSY U865733

       UP15/05/19 I 1000

PTF to Fileset Mapping



Document information

More support for: AIX Enterprise Edition

Software version: 710

Operating system(s): AIX

Reference #: IV71769

Modified date: 11 May 2016