APAR status
Closed as program error.
Error description
If a SIGSEGV or similar memory exception happens while contacting the LDAP server for user/group information, then later queue manager operations involving user/group lookups hang permanently.
Local fix
Problem summary
**************************************************************** USERS AFFECTED: Users of a queue manager that suffers a memory exception (for example a SIGSEGV) in the area of code within the queue manager authorization service (also called the OAM) implementing LDAP connectivity. Platforms affected: MultiPlatform **************************************************************** PROBLEM DESCRIPTION: Because of the memory exception, the LDAP client code had not released a mutex. A later call to the LDAP client code from the same MQ queue manager process, using the same LDAP context handle, hung because it waited for that mutex. The mutex is never released, making this a permanent hang in the queue manager.
Problem conclusion
The MQ code has been changed so that the LDAP context handle is not used again, following a SIGSEGV or similar memory exception in this area of the queue manager. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v8.0 8.0.0.12 v9.0 LTS 9.0.0.6 v9.1 CD 9.1.2 v9.1 LTS 9.1.0.2 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
IT27634
Reported component name
IBM MQ APPL M20
Reported component ID
5725Z0900
Reported release
800
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2018-12-28
Closed date
2019-01-23
Last modified date
2019-01-23
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
IBM MQ APPL M20
Fixed component ID
5725Z0900
Applicable component levels
[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SS5K6E","label":"IBM MQ Appliance"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.0","Edition":"","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]
Document Information
Modified date:
23 January 2019