A fix is available
APAR status
Closed as program error.
Error description
An ARCHIVE request for an archive that resides on a TAPE Unit, is being held up at Queue Manager startup, while the Tape Unit is offline, as shown by this message: IEF244I CSQ2MSTR CSQ2MSTR - UNABLE TO ALLOCATE 1 UNIT(S) 583 AT LEAST 1 OFFLINE UNIT(S) NEEDED. During this time, the CHINIT address space did not complete until the outstanding tape request was replied. The hang occurs due to SYSZIOT contention delaying processing of a LOAD issued by the command server. The contention is caused by the unavailability of tape systems required for log archiving. Although both the queue manager and chinit have successfully completed startup, the delay in the command server means commands issued via SYSTEM.COMMAND.INPUT
Local fix
Take steps to allow archive processing to complete.
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM MQ for z/OS Version 9 * * Release 1 Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: Startup not completing due to SYSZIOT * * contention. * **************************************************************** During startup a log offload is outstanding so CSQJOFF1 is called to offload the logs. The required tape drive is offline so the offload task is suspended in DYNALLOC processing waiting for the device, while holding the SYSZTIOT ENQ. The command server CSQNRTS then runs to process a PCF message and detects that the conversion tables have not yet been loaded, and calls CSQACRTT to load them. This hangs because the LOAD issued by CSQACRTT requires the SYSZTIOT ENQ. Startup can not complete until the outstanding tape request is satisfied.
Problem conclusion
Command server subsystem startup processing in CSQNSTRT has been updated to load the conversion tables before log offload processing can run.
Temporary fix
Comments
APAR Information
APAR number
PH23328
Reported component name
IBM MQ Z/OS V9
Reported component ID
5655MQ900
Reported release
100
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2020-03-16
Closed date
2020-05-28
Last modified date
2020-09-01
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI69746
Modules/Macros
CSQNSTRT
Fix information
Fixed component name
IBM MQ Z/OS V9
Fixed component ID
5655MQ900
Applicable component levels
R100 PSY UI70053
UP20/08/11 P F008 ¢
Fix is available
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Document Information
Modified date:
03 September 2020