IBM Support

IT39359: Db2 hangs with many EDUs waiting on logTailHeartBeatLatch

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APAR status

  • Closed as program error.

Error description

  • Db2 hangs with many EDUs waiting on logTailHeartBeatLatch.
    
    This problem only occurs on database using HADR feature. It is
    caused by abnormal termination of "db2pd -hadr" command, where
    the db2pd process was killed while holding this particular
    latch.
    
    The problem can be identified with db2hadrp thread having the
    following stack:
    
    0x090000006C2C0C98 sqloXlatchConflict + 0x8F8
    0x090000006E089910
    sqlpGetLogTailHeartBeat__FP9SQLP_DBCBP17SQLPG_LOG_TAIL_HB +
    0x370
    0x090000006DDB9FF0 hdrStoreLocMonElements + 0xAF0
    0x090000006DDBA478
    hdrStoreReceivedMonElements__FP8HDR_DBCBP11HDR_HDR_MSG + 0x58
    0x090000006DDFF428 hdrEduP__6hdrEduFCbPUl + 0x2968
    0x090000006DE160E0 hdrEduEntry__6hdrEduFv + 0x1DA0
    
    Waiting on latch type:
    (SQLO_LT_SQLP_DBCB__logTailHeartBeatLatch) - Address:
    (0xa0002000009e2e8), Line: 6632, File: sqlputil.C
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * HADR                                                         *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Update to 11.5.8.0                                           *
    ****************************************************************
    

Problem conclusion

  • Update to 11.5.8.0
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT39359

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    B50

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2021-12-09

  • Closed date

    2022-03-28

  • Last modified date

    2022-04-11

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

    IT39279

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

Fix information

  • Fixed component name

    DB2 FOR LUW

  • Fixed component ID

    DB2FORLUW

Applicable component levels

[{"Line of Business":{"code":"LOB10","label":"Data and AI"},"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSEPGG","label":"DB2 for Linux- UNIX and Windows"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"11.5"}]

Document Information

Modified date:
12 April 2022