EWTR SUBTASK UNEXPECTED TERMINATION - I/O ERROR ON EVENT DATASET EQQEVDS

Technote (troubleshooting)


Problem(Abstract)

"I/O ERROR on the EVENT DATASET (DDNAME EQQEVDS)" error occurs and terminates the EVENT WRITER SUBTASK of an TWSz MVS (OS/390) Tracker. The following messages also appear in the EQQMLOG, STARTED TASK JOBLOG, and system console log:

Cause

JOBLOG:
EQQZ210I O82T EQQEVDS SEVERE ERROR : I/O ERROR OCCURRED
EQQZ045E OPC SUBTASK EVENT WRITER ENDED UNEXPECTEDLY
.

EQQMLOG:
EQQW016E AN UNRECOVERABLE I/O ERROR OCCURRED. SYNAD MESSAGE FOLLOWS
EQQW016I 05A5,D,EQQEVDS ,READ ,OUT OF EXTENT ,TTR UNKNOWN ,BSAM
EQQW012E THE EVENT WRITER TERMINATED BECAUSE OF UNRECOVERABLE ERRORS
EQQZ045E OPC SUBTASK EVENT WRITER ENDED UNEXPECTEDLY
EQQZ034I OPC SUBTASK EVENT WRITER HAS ENDED.
.

SYSLOG:
SMS4000I O82T, O82T, EQQEVDS, ATTEMPTING SPACSECA FOR S99.SCXLO.JNL1TWS.EVTR01,
SMS4001I RECOVERY ATTEMPT FAILED TO PASS FLST/RLST CRITERIA                   
IEC031I D37-04,IFG0554P,O82T,O82T,EQQEVDS,05AB,SYS212,S99.SCXLO.JNL1TWS.EVTR01
.
This may occur if the EVENT DATASET is not allocated CONTIG with a single EXTENT, and is not totally exempted from SMS management.

A similar problem may occur with the SUBMIT/RELEASE dataset (DDNAME EQQSUDS) under the same conditions.


Resolving the problem

The TWSz EVENT and SUBMIT/RELEASE datasets are **SINGLE-EXTENT**, Wrap-Around datasets. They must be allocated CONTIG, with a single extent, and specifically exempted from processing or management by SMS or similar utilities, or by such products as STOPX37. These datasets are device dependent, and must be defined is immovable.

Cross reference information
Segment Product Component Platform Version Edition
Systems and Asset Management Tivoli Operations Planning and Control Not Applicable MVS/ESA, OS/390 2.1, 2.2, 2.3

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Document information


More support for:

Tivoli Workload Scheduler for z/OS

Software version:

Version Independent

Operating system(s):

OS/390, z/OS

Reference #:

1044726

Modified date:

2013-04-16

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