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  1. #1
    Join Date
    May 2010

    Red face Unanswered: MESSAGE : O33 Read Queue Timeout Loop Max Exceeded


    We just migrated our Production DB2 V8.1 to DB2 V9.7 This is the third time we did such a migration, but, this time something seems to have changed and we started running into problem that we never ran into. The following message keeps occurring in db2diag.log and the database simply hangs forever. It doesn't respond to any SQL or db2start/db2stop commands either.

    2010-05-27- I40945655A333 LEVEL: Info
    PID : 21760 TID : 1 PROC : db2
    INSTANCE: insindo NODE : 000
    EDUID : 1
    FUNCTION: DB2 UDB, command line process, clp_read_outputq, probe:88
    MESSAGE : O33 Read Queue Timeout Loop Max Exceeded
    DATA #1 : signed integer, 4 bytes

    Can you help me?

  2. #2
    Join Date
    Aug 2008
    Toronto, Canada
    Reduce your diaglevel to 3 in order to stop this message. For the hang, force the instance to come down (db2_kill) and then perform manual cleanup. After executing db2_kill, execute ps -ef | grep insindo and ipcs | grep insindo. Remove processes (kill -9) / ipc resources (ipcrm) owned by insindo. When everything has been cleaned up, restart the instance and try executing some db2 commands/statements.

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