taskXymon Clients for System z OSs - Tasks: task #13212, HOBCICOL file locked when shared...

 
 

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task #13212: HOBCICOL file locked when shared with multiple CICSes in VSE client

Submitter:  Juha Vuori <juvuori>
Submitted:  Mon 19 May 2014 09:38:13 PM UTC
   
 
Should Start On:  Sat 31 May 2014 09:00:00 PM UTC Should be Finished on:  Thu 31 Jul 2014 09:00:00 PM UTC
Category:  Bug fix Priority:  5 - Normal
Status:  In Progress Privacy:  Public
Assigned to:  juvuori Percent Complete:  0%
Open/Closed:  Open Effort:  0.00

Wed 28 May 2014 03:02:15 PM UTC, comment #1: 

The problem is not related to wrong parsing in Xymon client. It seems to be a bug in IDCAMS/LISTCAT output:

When the user catalog file is defined in the same volume as catalog space, LISTCAT CATALOG(xxx) SPACE ALL outputs wrong ATTRIBUTE to the DATASPACE.

E.g. when the user catalog is defined with commands

DEFINE USERCATALOG ( -
        NAME (USER.PRI.DATA.XX) -
        CYLINDERS (5) -
        VOLUME (XX1003))
DEFINE SPACE ( -
        DEDICATE -
        VOLUME (XX1003)) -
        CATALOG (USER.PRI.DATA.XX)

LISTCAT CATALOG(xxx) SPACE ALL reports the following for the volume XX1003:

VOLUME -------- XX1003
     HISTORY
       RELEASE----------------2
     CHARACTERISTICS
       BYTES/TRK----------58786     DEVTYPE---------BIG-3390     MAX-PHYREC-SZ------56664     DATASETS-ON-VOL------188
       TRKS/CYL--------------15     VOLUME-TIMESTAMP:            MAX-EXT/ALLOC----------5     DATASPCS-ON-VOL--------2
       CYLS/VOL-----------10017          2011.039   23:33:27
                                         X'C74DB8B7FC610704'
     DATASPACE
       DATASETS---------------1     FORMAT-1-LABEL:              ATTRIBUTES:
       EXTENTS----------------1     CCHHR------X'0000000103'     SUBALLOC
       SEC-ALLOC--------------0     TIMESTAMP                    EXPLICIT
       TYPE---------------TRACK          2011.039   23:33:26     USERCAT
       CLASS------------------0          X'C74DB8B75FA89784'
       EXTENT-DESCRIPTOR:
       CYL-TOTAL--------------5     BEG-CCHH-----X'00030000'     BIG-SPC-MAP---------05
       CYL-USED---------------5
       DATASET-DIRECTORY:
         DSN----USER.PRI.DATA.XX                                 ATTRIBUTES--------(NULL)     EXTENTS----------------3
     DATASPACE
       DATASETS--------------17     FORMAT-1-LABEL:              ATTRIBUTES:
       EXTENTS----------------1     CCHHR------X'0000000104'     SUBALLOC
       SEC-ALLOC--------------0     TIMESTAMP                    EXPLICIT
       TYPE---------------TRACK          2011.039   23:33:27     USERCAT
       CLASS------------------0          X'C74DB8B7FC610704'
       EXTENT-DESCRIPTOR:
       CYL-TOTAL----------10009     BEG-CCHH-----X'00080000'     BIG-SPC-MAP---------FD0E160AFD00DDFD16F2FD00DFFD004B
       CYL-USED------------4050
       DATASET-DIRECTORY:
         DSN----USER.PRI.DATA.XX                                 ATTRIBUTES--------(NULL)     EXTENTS----------------1
         ...

Attribute USERCAT is wrong in the second dataset - that's why XymonVSE client does not recognize the volume at all as the catalog's space.
To be corrected by IBM.

Juha Vuori <juvuori>
Group administrator
Mon 19 May 2014 09:38:13 PM UTC, original submission:  

We've got six application CICSes running, and when we defined the same output file (lbl=HOBBIT file=TP1CAT/HOBBIT.CICS) for all of them for output storage of the program HOBCICOL, awful things started to happen occasionally: IIRC, normal CICS shutdowns with CEMT P SHUT hanged forever in cases two CICSes had started at the same second. I imagine HOBCICOL was somehow open to multiple cicses or to the XymonVSE client reading the file, and that prevented shutdown from completing normally.
I had to remove HOBCICOL from CICS PLTs, which is a shame as it would be very useful to follow DSA usage and transaction rate over the years.
The problem should be analysed and some corrections made.. maybe having a separate file for each CICS would stabilise HOBCICOL.

Juha Vuori <juvuori>
Group administrator

 

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    Date Changed by Updated Field Previous Value => Replaced by
    2014-05-28 juvuori Assigned toNone juvuori
    2014-05-19 juvuori Carbon-Copy- Added juvuori

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