|
Problem IC65836
|
Status: Closed |
AFTER A TAKEOVER, HADR MONITOR SCRIPT MAY SHOW AN ONLINE HADR DATABASE ON THE OLD PRIMARY NODE. |
| product: |
DB2 FOR LUW / DB2FORLUW / 950 - DB2 |
| Problem description: |
In an automated cluster controlled HADR environment, after a
primary node reboot, there is a small timing hole where HADR
monitor
script may show that the HADR database resource online.
In the OS log, you will see an instance start message after
reboot of old primary node (amdha1). But before the instance
start, HADR monitor script may return a return code of 1 i.e.,
online for HADR database resource.
Jan 20 11:43:30 amdha1 db2V95_start.ksh[5104]: Entered
/usr/sbin/rsct/sapolicies/db2/db2V95_start.ksh, db2inst5, 0
Jan 20 11:43:30 amdha1
/usr/sbin/rsct/sapolicies/db2/hadrV95_monitor.ksh[5123]:
Returning 1 : db2inst5 db2inst5 UC4G
Jan 20 11:43:39 amdha1 db2V95_start.ksh[5878]: Returning 0 from
/usr/sbin/rsct/sapolicies/db2/db2V95_start.ksh ( db2inst5, 0)
Due to this timing issue, TSAMP will see the same HADR database
resource online on both servers. A resource cannot be online on
more than one node concurrently in a TSAMP managed environment.
So it will stop all instances of HADR database resource, and
start it up on the old primary due to the order of the
NodeNameList. This gives an appearance of an automatic failback
after the original primary node rejoins. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* Users with HADR on a cluster env *
****************************************************************
* PROBLEM DESCRIPTION: *
* AFTER A TAKEOVER, HADR MONITOR SCRIPT MAY SHOW AN *
* ONLINEHADRDATABASE ON THE OLD PRIMARY NODE. *
****************************************************************
* RECOMMENDATION: *
* Upgrade to 9.5 FP6 *
**************************************************************** |
| Local Fix: |
|
| available fix packs: |
DB2 Version 9.5 Fix Pack 6a for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 10 for Linux, UNIX, and Windows
|
| Solution |
AFTER A TAKEOVER, HADR MONITOR SCRIPT MAY SHOW AN ONLINE HADR
DATABASE ON THE OLD PRIMARY NODE. |
| Workaround |
not known / see Local fix |
| BUG-Tracking |
forerunner : APAR is sysrouted TO one or more of the following: IC65837
follow-up : |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 25.01.2010
31.05.2010
31.05.2010 |
| Problem solved at the following versions (IBM BugInfos) |
9.5.FP6
|
| Problem solved according to the fixlist(s) of the following version(s) |
