|
Problem IC72329
|
Status: Closed |
HADR may disconnect with 'HADR_TIMEOUT' message after system clock is set backwards. |
| product: |
DB2 FOR LUW / DB2FORLUW / 950 - DB2 |
| Problem description: |
When HADR is running, if the system clock is set backwards by
any amount (even less than a second), there is a chance that
HADR will disconnect with a message similar to the following in
the diag.log:
2010-05-25-06.15.21.808743-240 I23270A490 LEVEL: Error
PID : 23818 TID : 1 PROC :
db2hadrs (XXXXXXX) 0
INSTANCE: db2xxxxx NODE : 000
FUNCTION: DB2 UDB, High Availability Disaster Recovery,
hdrEduAcceptEvent, probe:20200
MESSAGE : Did not receive anything through HADR connection for
the duration of
HADR_TIMEOUT. Closing connection.
DATA #1 : Hexdump, 4 bytes
0xFFFFFFFF7FFFD174 : FFFF FFFF
A high entry like 'FFFF FFFF' strongly suggests that this
problem has happened.
It is possible that the system clock was set backwards by an
automated system-clock maintenance process (such as xntpd). You
can look for entries in system logs like /var/log/messages for
time changes around any 'HADR_TIMEOUT' disconnection. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* ALL *
****************************************************************
* PROBLEM DESCRIPTION: *
* When HADR is running, if the system clock is set backwards *
* by *
* any amount (even less than a second), there is a chance that *
* *
* HADR will disconnect with a message similar to the following *
* in *
* the diag.log: *
* *
* *
* *
* 2010-05-25-06.15.21.808743-240 I23270A490 LEVEL: *
* Error *
* PID : 23818 TID : 1 PROC : *
* *
* db2hadrs (XXXXXXX) 0 *
* *
* INSTANCE: db2xxxxx NODE : 000 *
* *
* FUNCTION: DB2 UDB, High Availability Disaster Recovery, *
* *
* hdrEduAcceptEvent, probe:20200 *
* *
* MESSAGE : Did not receive anything through HADR connection *
* for *
* the duration of *
* *
* HADR_TIMEOUT. Closing connection. *
* *
* DATA #1 : Hexdump, 4 bytes *
* *
* 0xFFFFFFFF7FFFD174 : FFFF FFFF *
* *
* *
* *
* A high entry like 'FFFF FFFF' strongly suggests that this *
* *
* problem has happened. *
* *
* *
* *
* It is possible that the system clock was set backwards by an *
* *
* automated system-clock maintenance process (such as xntpd). *
* You *
* can look for entries in system logs like /var/log/messages *
* for *
* time changes around any 'HADR_TIMEOUT' disconnection. *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 V9.5 FP8. *
**************************************************************** |
| Local Fix: |
If the HADR pair does not automatically reconnect, deactivate
the database and reactivate it. |
| available fix packs: |
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 |
Problem was first fixed in Version 9.5 Fix Pack 8. |
| Workaround |
If the HADR pair does not automatically reconnect, deactivate
the database and reactivate it. |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 02.11.2010
11.07.2011
11.07.2011 |
| Problem solved at the following versions (IBM BugInfos) |
9.5.FP8
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.5.0.8
|
 |
