APAR status
Closed as program error.
Error description
The Tivoli Storage Manager 6.x server has deduplication deletion threads that remove chunks that have been dereferenced either by expiration or data movement processes. If these threads stop running the dedup chunks will not be removed. This will lead to reclamation not being able to complete and dedup storage pools to fill unexpectedly. The dedup deletion thread processing is very resilient except for one point at the beginning of their processing. If a problem should occur that causes this initial processing to fail the threads will terminate and not attempt to start again until the server is restarted. Running out of log space or DB2 locklist failures are two failures that have been reported as leading to this thread failure. The server needs to be more resilient at this thread beginning point to avoid terminating these critical threads on a server using deduplication. Message indicating the termination of these threads should also be externalized. Tivoli Storage Manager Versions Affected: TSM server 6.x using deduplication Customer/L2 Diagnostics (If Applicable) Before using the SHOW DEDUPDELETEINFO commend referenced below please ensure you have the fix for IC79957 in place to avoid the potential crash addressed by this APAR. When problem has occurred SHOW DEDUPDELETEINFO returns: The dedup deletions have been disabled. Normal show SHOW DEDUPDELETEINFO returns something like: ****Dedup Deletion General Status**** Number of worker threads : 4 Number of active worker threads : 0 Number of chunks waiting in queue : 0 ****Dedup Deletion Worker Info**** Worker thread 1 is not active Worker thread 2 is not active Worker thread 3 is not active Worker thread 4 is not active ------------------------------------------ Total worker chunks queued : 0 Total worker chunks deleted : 0 Server Actlog for reported case where exhausted log space is the catalyst shows: ANR0171I tbrsql.c(1430): Error detected on 2:2, database in evaluation mode. ANR0103E bfdedup.c(9183): Error 2157 updating row in table "BF.Queued.Chunks". ANR0171I dbitxn.c(695): Error detected on 0:2, database in evaluation mode. ANR0130E dbitxn.c(1710): Server LOG space exhausted. ANR0162W Supplemental database diagnostic information: -1:40003:-99999 ([IBM][CLI Driver] CLI0108E Communication link failure. SQLSTATE=40003). 01/18/2012 13:06:44 ANR0171I dbiconn.c(1784): Error detected on 0:2, database in evaluation mode. Initial Impact: Medium Additional Keywords: TSM deduplicated
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All Tivoli Storage Manager server users. * **************************************************************** * PROBLEM DESCRIPTION: See ERROR DESCRIPTION. * **************************************************************** * RECOMMENDATION: Apply fixing level when available. * * This problem is currently projected to be * * fixed in levels 6.2.4 and 6.3.1. * * Note that this is subject to change at * * the discretion of IBM. * **************************************************************** *
Problem conclusion
The described problem has been resolved. AFFECTED PLATFORMS: AIX, HP-UX, Solaris, Linux, and Windows.
Temporary fix
Comments
APAR Information
APAR number
IC81119
Reported component name
TSM SERVER
Reported component ID
5698ISMSV
Reported release
62W
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2012-01-31
Closed date
2012-02-07
Last modified date
2013-08-23
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
TSM SERVER
Fixed component ID
5698ISMSV
Applicable component levels
R61A PSY
UP
R61H PSY
UP
R61L PSY
UP
R61S PSY
UP
R61W PSY
UP
R62A PSY
UP
R62H PSY
UP
R62L PSY
UP
R62S PSY
UP
R62W PSY
UP
R63A PSY
UP
R63H PSY
UP
R63L PSY
UP
R63S PSY
UP
R63W PSY
UP
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Document Information
Modified date:
23 August 2013