IT26197: DB2START MIGHT FAIL WITH SQL6036 AFTER DB2STOP TIMEOUT OCCURS

Db2 Version 11.1 Mod 4 Fix Pack 6 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 6 for Linux, UNIX, and Windows

APAR status

• Closed as program error.

Error description

• db2start might fail with SQL6036 (START or STOP DATABASE MANAGER
  command is already in progress) after db2stop timeout occurs.
  
  This problem occurs as following:
  1) db2stop starts
  2) db2stop spawns db2stop2 process and db2stop2 process has a
  lock on the file db2stst.0000
  3) db2stop timeout occurs (SQL1042C)
  4) db2stop sends SIGTERM to db2stop2 process and then db2stop
  exits
  5) Signal handler for SIGTERM in db2stop2 sends SIG_DUMP (for PD
  purpose) and sleeps for 20 seconds
  6) User calls db2_kill / ipclean since db2stop exits with
  SQL1042C and runs db2start, but db2start fails with SQL6036
  since db2stop2 still holds a lock on the file db2stst.0000
  
  The root cause is that db2stop exists before db2stop2 exits in
  the step 4).
  db2stop should wait for db2stop2 exits when db2stop timeout
  occurs.
  

Local fix

• Run db2start more then 20 seconds after db2stop timeout.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * ALL                                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to Db2 11.1 Mod 4 Fixpack 6 or higher                *
  ****************************************************************
  

Problem conclusion

• First fixed in Db2 11.1 Mod 4 Fixpack 6
  

Temporary fix

Comments

APAR Information

• 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

  DB2 FOR LUW

• Fixed component ID

  DB2FORLUW

Applicable component levels

• RB10 PSN

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