APAR status
Closed as program error.
Error description
Upon queue manager startup the queue manager might report one or more recovery log extent(s) as corrupt in the queue manager error logs. Error message: 11/27/2022 04:30:34 PM - Process(1805476.5) User(mqm) Program(amqzmuc0) Host(ibmhost1) Installation(Installation1) VRMF(9.3.0.0) QMgr(TESTQMGR) Time(2022-11-27T15:30:34.437Z) CommentInsert1(S0000181.LOG) AMQ6762E: IBM MQ log extent S0000181.LOG corrupt. EXPLANATION: Log extent S0000181.LOG has been detected as corrupt and is not valid for use. ACTION: Determine how the log extent has become corrupt and take action to ensure that this extent is no longer required for either restart or media recovery. This might require taking media images. AMQ6762E: IBM MQ log extent S000nnnn.LOG corrupt. This problem is unlikely to cause any issue in the queue manager other than generating the error message.
Local fix
Problem summary
**************************************************************** USERS AFFECTED: Users using queue manager with LINEAR logging and LogManagement=Automatic Platforms affected: MultiPlatform **************************************************************** PROBLEM DESCRIPTION: This problem occurred due to timing condition causing an MQ thread trying to access a log extent before the completion of the initialization of that log extent by another thread.
Problem conclusion
MQ code has been modified to prevent the thread accessing the log extent before the completion of initialization to resolve the issue. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v9.3 LTS 9.3.0.5 v9.x CD 9.3.3 The latest available maintenance can be obtained from 'WebSphere MQ Recommended Fixes' http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037 If the maintenance level is not yet available information on its planned availability can be found in 'WebSphere MQ Planned Maintenance Release Dates' http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309 ---------------------------------------------------------------
Temporary fix
Comments
APAR Information
APAR number
IT42690
Reported component name
MQ BASE V9.3
Reported component ID
5724H7291
Reported release
930
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2022-12-12
Closed date
2023-02-22
Last modified date
2023-02-22
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
MQ BASE V9.3
Fixed component ID
5724H7291
Applicable component levels
[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"9.3","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
23 February 2023