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IC82497: RACE CONDITION PREVENTS EVENT MONITOR FAST WRITERS AND OTHER BACKGROUND AGENTS FROM STARTING

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • There is a race condition during database activation. A
    combination of user connections and transaction manager (TM)
    database connections may result in event monitor fast writer not
    starting. An activate of any event monitor will get error, e.g.
    
    SET EVENT MONITOR DB2ACTIVITIES STATE 1
    
    Subsequent SQL statements can be processed.  (Reason "Unable to
    activate event monitor because no fast writers are started".).
    SQLCODE=-901, SQLSTATE=58004, DRIVER=4.8.86
    
    
    In db2diag.log, you may see
    
    2012-02-24-14.42.54.222955-480 E1126722A526       LEVEL: Warning
    
    PID     : 4784134              TID  : 13109       PROC : db2sysc
    0
    INSTANCE: db2inst            NODE : 000         DB   : SAMPLE
    
    APPHDL  : 0-71                 APPID:
    172.22.53.47.4599.120224224251
    AUTHID  : DB2INST
    
    EDUID   : 13109                EDUNAME: db2agent (SAMPLE) 0
    
    FUNCTION: DB2 UDB, database monitor,
    sqm_evmon_mgr::restartEvmons,
    probe:16
    
    DATA #1 : <preformatted>
    
    Unable to activate event monitor DB2ACTIVITIES because no fast
    writers are started
    

Local fix

  • force off all application
    deactivate database
    activate database
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * ALL                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to DB2 Version 9.7 Fix Pack 7                        *
    ****************************************************************
    

Problem conclusion

  • First fixed in Version 9.7 Fix Pack 7
    

Temporary fix

Comments

APAR Information

  • APAR number

    IC82497

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    970

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-04-04

  • Closed date

    2012-12-10

  • Last modified date

    2012-12-10

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

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

    IC87831

Fix information

  • Fixed component name

    DB2 FOR LUW

  • Fixed component ID

    DB2FORLUW

Applicable component levels

  • R970 PSN

       UP



Document information

More support for: DB2 for Linux, UNIX and Windows

Software version: 9.7

Reference #: IC82497

Modified date: 10 December 2012