A fix is available
APAR status
Closed as program error.
Error description
When an address space goes through end of memory without having gone through end of task, there is a timing window where RRS resync processing could dead-lock with the end of memory process. RRS resync processing hangs. An IEAVTMTR TCB hangs in the master address space in CSQMCLMT, waiting for EBACTL to be turned back on and going into regular sleeps. CSQ3RRSR is processing a context relating to this EB, and is suspended, waiting for the MCLB latch to be released (currently held by CSQMCLMT).
Local fix
Cancel and restart the queue manager.
Problem summary
**************************************************************** * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 * * Release 0 Modification 1 and * * Release 1 Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: After applying the PTF for PM75418, * * UK91873 / UK91874, MEMTERM processing * * for a WAS address space connected to MQ * * is hanging. * * CSQ3RRSR processing may hang in the * * queue manager in case of an RRS * * failure. * **************************************************************** * RECOMMENDATION: * **************************************************************** The connected WAS address space has experienced abends, and has then been MEMTERM'ed with S40D. During MEMTERM processing, RRS contexts are being cleaned up. The EB that is being processed has EBACTL set off, indicating that it is in MQ code. CSQMCLMT therefore waits for EBACTL to be set back on. However, EBACTL will never get set back on as the address space that it was running under has been MEMTERM'ed.
Problem conclusion
The code was changed to not wait for EBACTL to be turned back on if the connected WAS address space has been MEMTERM'ed, preventing the hang from occurring. 010Y 100Y CSQARIB CSQEKATM CSQEMTKN CSQIDDA1 CSQIRECP CSQMCALH CSQMCLMT CSQMCLOS CSQMCPRH CSQMCSTR CSQMCTXE CSQMCTXS CSQMDALL CSQMDCOH CSQMGETV CSQMLCUR CSQMLEPL CSQMOAOH CSQMXARH CSQMXCLN CSQMXCL1 CSQMXTEA CSQMXTEG CSQM148M CSQM212M CSQNINS CSQWDCBF CSQ3AAES CSQ3AMT3 CSQ3RRSF CSQ3RRSI CSQ3RRSM CSQ3RRSR CSQ3RRSX CSQ3RRXF CSQ5CONN CSQ5MONR CSQ5WXCF CSQ5XWK1 CSQ7CBE CSQ7CBMC HMS7100J
Temporary fix
********* * HIPER * *********
Comments
APAR Information
APAR number
PI24808
Reported component name
WMQ Z/OS V7
Reported component ID
5655R3600
Reported release
010
Status
CLOSED PER
PE
YesPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2014-09-01
Closed date
2014-09-30
Last modified date
2014-12-11
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI21867 UI21868 PI27590
Modules/Macros
CSQARIB CSQEKATM CSQEMTKN CSQIDDA1 CSQIRECP CSQMCALH CSQMCLMT CSQMCLOS CSQMCPRH CSQMCSTR CSQMCTXE CSQMCTXS CSQMDALL CSQMDCOH CSQMGETV CSQMLCUR CSQMLEPL CSQMOAOH CSQMXARH CSQMXCLN CSQMXCL1 CSQMXTEA CSQMXTEG CSQM148M CSQM212M CSQNINS CSQWDCBF CSQ3AAES CSQ3AMT3 CSQ3RRSF CSQ3RRSI CSQ3RRSM CSQ3RRSR CSQ3RRSX CSQ3RRXF CSQ5CONN CSQ5MONR CSQ5WXCF CSQ5XWK1 CSQ7CBE CSQ7CBMC HMS7100J
Fix information
Fixed component name
WMQ Z/OS V7
Fixed component ID
5655R3600
Applicable component levels
Fix is available
Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.
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Document Information
Modified date:
11 December 2014