APAR status
Closed as program error.
Error description
<span style="background-color:rgb(255, 255, 255)">During calls to MQOPEN, MQCTL or MQGET a </span> race condition can cause MQ to generate the following failure data capture (FDC) record: Probe Id :- <span style="background-color:rgb(255, 255, 255)">RM632001</span> Component :- <span style="background-color:rgb(255, 255, 255)">reqGetConn</span> <span style="background-color:rgb(255, 255, 255)">Major Errorcode :- MQRC_HCONN_ERROR</span> The generation of the FDC does not happen consistently since it is subject to the timing of two threads.
Local fix
Problem summary
**************************************************************** USERS AFFECTED: All MQ users making calls to MQOPEN, MQCTL or MQGET. Platforms affected: MultiPlatform **************************************************************** PROBLEM DESCRIPTION: An error in the MQ code created a race condition where two threads attempting to access information on the same connection handle could interfere with each other and generate an FDC.
Problem conclusion
The MQ code has been corrected so that the lock used to access connection handle information is now released at the correct time. This means multiple threads accessing the same connection handle information simultaneously will now wait for each other correctly, and no longer cause FDCs to be generated. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v9.1 CD TBC. v9.1 LTS 9.1.0.5 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
IT31311
Reported component name
IBM MQ BASE MP
Reported component ID
5724H7271
Reported release
910
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2019-12-17
Closed date
2020-03-30
Last modified date
2020-03-30
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
IBM MQ BASE MP
Fixed component ID
5724H7271
Applicable component levels
[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"910","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
30 March 2020