Error executing db6_update_db.sh after DB2 9.7 FixPack 4

Question

Hi experts,
We are encountering error while executing db6_update_db.sh after DB2 9.7 FP4. Has anybody encountered the same error? Any SAP notes you could suggest? Below are some informations on the error. We would appreciate any response and help to resolve the issue. Thanks in advance.
Executing the script:
db6_update_db.sh script version 0026           *
detected DB2 Release:  090704
./db6_update_db.sh  version 0026 started on Fri Mar  2 03:25:34 GMT 2012
Generate Script Header                                                 : OK
Check and create 16K Bufferpool if required                            : OK
Run db2upd tools according to release if required                      : OK
Invoke the db2sap libary                                               : OK
Rebind packages                                                        : OK
Establish sysdummy workaround                                          : ERROR
  ERROR: SQL error occured.
Failed with return code 2. Please look for problems in the log file /db2/db2k3d/
db6_update_db.log
./db6_update_db.sh  finished successfully (RC=0) on Fri Mar  2 03:25:37 GMT 2012
Checking the logs.
DEBUG: () : ACTION_TEXT: Establish sysdummy workaround                         
Establish sysdummy workaround                                         
DEBUG: sqlExecute() : entry
DEBUG: () : PARAM_SQL_FILE:
/db2/db2k3d/db6_update_db_out.sql
DEBUG: () : SQL_LINES_BEFORE: 42
DEBUG: () : PARAM_SQL_STMT:
SELECT 'GRANT SELECT ON TABLE SYSIBM.SYSDUMMY1 TO PUBLIC;'
FROM   TABLE( VALUES( 'PUBLIC' ) ) AS SAPAUTH( USERNAME )
        LEFT OUTER JOIN ( SELECT GRANTEE
                          FROM   SYSCAT.TABAUTH
                          WHERE  GRANTEE = 'PUBLIC' AND
                                 GRANTEETYPE = 'G' AND
                                 TABNAME = 'SYSDUMMY1' AND
                                 TABSCHEMA = 'SYSIBM' AND
                                 (SELECTAUTH = 'Y' OR SELECTAUTH = 'G')) AS TABA
UTH
        ON SAPAUTH.USERNAME = TABAUTH.GRANTEE
WHERE  TABAUTH.GRANTEE IS NULL
SQL1024N  A database connection does not exist.  SQLSTATE=08003
DEBUG: () : ERROR

Answer 1

Hmm, interesting.
db6_update_db.sh is a ksh script.  I have a PMR open for seemingly similar problems with ksh93 disconnects since upgrading to AIX 7.1 from 5,3.  Previous the same script worked fine.  Further testing has found similar problems under fewer circumstances with AIX 5.3.  We haven't encountered the issue with ksh yet, but who knows...
As Thomas suggested, DB2DBDFT masks the problem so long as a persistent connection is not required.
Regards,
Jeremy Rickard