A fix is available
APAR status
Closed as program error.
Error description
Unpred- Unpredictable hangs or waits can occur due to the communication network lock being held by a task with a low dispatching priority in the CMAS. . If a CMAS is recycled in a large CMAS network, the recycled CMAS may experience any or all of the following symptoms. . - CMAS can go MAXTASK - CMAS can go SOS (Short-on-Storage) System under stress DFHSM0131 DFHSM0133 - MASes may fail to connect - EYUNL0090W timeout MASINITTIME - CMAS repository synchronization failed EYUCP0205S - CMAS isolation EYUCP0023E EYUCP0024E - API program ENVIRONERROR TIMEOUT WUI timeout . Additional Symptom(s) Search Keyword(s): netlock dispatchable XLST priority 70 CHAP_TASK EYU0XLST slow hang hangs hung wait waits join connect fail fails failed workload wlm
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All CICSPlex/SM V3R1M0 Users * **************************************************************** * PROBLEM DESCRIPTION: Unpredictable hangs or waits can occur * * due to the communication network lock * * being held by a task with a low * * dispatching priority in the CMAS. * * * * If a CMAS is recycled in a large CMAS * * network, the recycled CMAS may * * experience any or all of the following * * symptoms: * * * * - CMAS may go MAXTASK. * * * * - CMAS may go SOS (Short-on-Storage), * * with CICS message DFHSM0131 or * * DFHSM0133 issued. * * * * - MASes may fail to connect, with * * message EYUNL0090W issued. * * * * - CMAS repository synchronization may * * fail, with message EYUCP0205S issued. * * * * - the CMAS may be isolated from the * * CMAS network, with messages * * EYUCP0023E and EYUCP0024E issued. * * * * - EUI requests may time-out. * * * * - API programs, including the WUI, may * * receive time-outs, with a Response of * * ENVIRONERROR and a Reason of TIMEOUT. * **************************************************************** * RECOMMENDATION: After applying the PTF that resolves this * * APAR, all CMASes must be restarted. Note * * that the restarts do not need to occur at * * the same time. * **************************************************************** When a request is shipped from one CMAS to another, it may run under a task with the transaction ID of XLST. The default priority of this task is lowered for these requests. Depending upon how busy the CMAS is, this may result in these tasks not being dispatched in a timely manner. This will not only affect these tasks, but it will also affect other tasks when the XLST task holds the communications lock. This can lead to any of the symptoms indicated above.
Problem conclusion
Method EYU0XLST (XLST) has been updated so that it will not lower its priority when it is executing a request shipped from another CMAS.
Temporary fix
********* * HIPER * ********* FIX AVAILABLE BY PTF ONLY
Comments
APAR Information
APAR number
PK47310
Reported component name
CPSM CICS 3.1
Reported component ID
5655M1501
Reported release
100
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt
Submitted date
2007-06-18
Closed date
2007-06-19
Last modified date
2007-07-03
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UK26241 PK47571 PK47637
Modules/Macros
EYU0XLST
Fix information
Fixed component name
CPSM CICS 3.1
Fixed component ID
5655M1501
Applicable component levels
R100 PSY UK26241
UP07/06/20 P F706
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:
22 February 2023