APAR status
Closed as program error.
Error description
MQ Dot Net Client connects to queue manager slowly. From the MQ Client trace, it could be seen that MQ internally tries to set a specific user credentials in to the UID structure and MQUID.SetUser(String,String) takes several seconds. This problem happens on large network. 17:47:23.833860 6032.1 (10)-----------{ MQUID.SetUser(String,String) inputs [usr1] [dom1] 17:47:32.068386 6032.1 SID for name='usr1' and domain='dom1' is 'S-1-5-21-1111111111-2222222222-3333333333-4444444' 17:47:32.068386 6032.1 (10)-----------} MQUID.SetUser(String,String) rc=OK
Local fix
Problem summary
**************************************************************** USERS AFFECTED: All MQ .Net client users on a large network will be affected Platforms affected: Windows **************************************************************** PROBLEM DESCRIPTION: MQ internally uses Win32_UserAccount WMI class which invokes the specified WMI Query and returns the SID for the specified user . As per the following MSDN doc https://msdn.microsoft.com/en-us/library/aa394507(v=vs.85).aspx Note: Because both the Name and Domain are key properties, enumerating Win32_UserAccount on a large network can negatively affect performance.
Problem conclusion
Code has been modified to query for the SID which avoids the delay on large network. An environment variable "AMQ_COMPUTE_SID" when set to "TRUE", will take a different path to retrieve the SID other than using Win32_UserAccount WMI class. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v8.0 8.0.0.10 v9.0 LTS 9.0.0.5 v9.1 CD 9.1.1 v9.1 LTS 9.1.0.1 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
IT22165
Reported component name
WMQ BASE MULTIP
Reported component ID
5724H7251
Reported release
800
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-08-28
Closed date
2018-06-21
Last modified date
2018-07-19
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
WMQ BASE MULTIP
Fixed component ID
5724H7251
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":"8.0.0.0","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
19 July 2018