IC92919: "PAGE CHECK ERROR IN BFPUT, PG_FRPTR > SLOTBEG" WHEN ROLLING BACK SOME DELETES ON A LOGGED TEMPORARY TABLE INDEX

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APAR status

  • Closed as program error.

Error description

  • With temp tables the rollback of index deletes (for table
    DELETEs or UPDATEs) can fail with page check error in bfput.
    The index will be set BAD after this.
    
    Sample assertion:
    
    12:01:50  Assert Failed: Page Check Error in bfput
    12:01:50   Who: Session(137, informix@mybox, 29819076,
    70000002047b1c8)
                    Thread(216, sqlexec, 70000002043c1a8, 1)
                    File: rsdebug.c Line: 1145
    12:01:50   Results: Possible inconsistencies in
    'stores7:"informix".mytmp'
    12:01:50   Action: Run 'oncheck -cDI stores7:"informix".mytmp'
    12:01:50   See Also: tmp/af.4c05e0e, shmem.4c05e0e.0
    12:01:53  Page Check Error in bfput
    12:01:54  Assert Failed: Rollback error 105
    12:01:54   Who: Session(137, informix@mybox, 29819076,
    70000002047b1c8)
                    Thread(216, sqlexec, 70000002043c1a8, 1)
                    File: rsextlog.c Line: 1718
    12:01:54   Results: Log record (OLDRSAM:DELITEM) in log 39,
    offset 0x3459c was not rolled back
    12:01:54   Action: Use 'onlog' to view the transaction and
    repair manually.
    12:01:54  stack trace for pid 20512964 written to
    /tmp/af.4c05e0e
    12:01:54   See Also: /sqldists/12.10.FC1B2/tmp/af.4c05e0e
    12:01:57  Rollback error 105
    
    
    In the af file you'll find:
    
    12:01:50  bfcheck: bad page: pg_frptr 2841 < sizeof(ifx_page_t)
    24 or > slotbeg 2840
    
    and a stack like this:
    
    12:01:50  Stack for thread: 216 sqlexec
    
     base: 0x07000000218f4000
      len:   69632
       pc: 0x00000001000ab6bc
      tos: 0x07000000219014c0
    state: running
       vp: 1
    
    (oninit)afstack
    (oninit)afhandler
    (oninit)affail_interface
    (oninit)bffail
    (oninit)buffput
    (oninit)btadditem
    (oninit)doitem
    (oninit)logundo
    (oninit)rlogm_undo
    (oninit)rollback
    (oninit)rsrollback
    (oninit)isrollback
    (oninit)sqisrollback
    (oninit)sqrollback
    (oninit)aud_sqrollback
    (oninit)excommand
    (oninit)sq_execute
    (oninit)sqmain
    (oninit)listen_verify
    (oninit)spawn_thread
    (oninit)startup
    
    
    One of the conditions for this failure seems to be that rows are
    inserted into the temp table and then deleted again, then new
    rows (with new index values!) are inserted and deleted as well,
    before all gets rolled back.
    

Local fix

  • Workaround could be dropping and recreatᄀng the temp table
    instead of purging and reusing it, or at least to recreate the
    index on every iteration.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * ALL DBUSERS using temp tables                                *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Update to IDS-11.70.xC8                                      *
    ****************************************************************
    

Problem conclusion

  • Problem Fixed In IDS-11.70.xC8
    

Temporary fix

Comments

APAR Information

  • APAR number

    IC92919

  • Reported component name

    INFORMIX SERVER

  • Reported component ID

    5725A3900

  • Reported release

    B70

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-06-07

  • Closed date

    2014-02-26

  • Last modified date

    2014-02-26

  • 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

    INFORMIX SERVER

  • Fixed component ID

    5725A3900

Applicable component levels

  • RC10 PSY

       UP



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Document information


More support for:

Informix Servers

Software version:

B70

Reference #:

IC92919

Modified date:

2014-02-26

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