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IGD17356I GDG RECLAIM REQUEST

 
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shiitiizz

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Joined: 12 Sep 2013
Posts: 19
Location: India

PostPosted: Mon Sep 07, 2015 12:07 pm    Post subject: IGD17356I GDG RECLAIM REQUEST
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Hi,

I have a GDG Base, say AAA.BBB.CCC, With Attributes
ATTRIBUTES
LIMIT-----------------10 SCRATCH NOEMPTY

And it has got 10 Generations present.

I ran a job, which has got DISP Parm as below
Code:

//G2       DD DSN=AAA.BBB.CCC(+1),                 
//            DISP=(,CATLG,DELETE),                                     
//            UNIT=DISK,DATACLAS=SEQFB,LRECL=200                       


I was expecting a new Generation to get created with the oldest generation to get deleted.

However, the job did something else, it used the most recent generation and overrode the data. The messages says as below:
Code:

IGD17356I GDG RECLAIM REQUEST WAS SUCCESSFULLY PROCESSED FOR DATA SET AAA.BBB.CCC.GLATEST


I could not understand why it would happen with DISP=NEW?

Any help or suggestions please.
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RahulG31

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Joined: 20 Dec 2014
Posts: 331
Location: USA

PostPosted: Mon Sep 07, 2015 1:46 pm    Post subject: Reply to: IGD17356I GDG RECLAIM REQUEST
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Did the same job fail earlier ? I mean; is it the second run of the job ?

See if this helps: http://www.ibmmainframes.com/about28837.html
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shiitiizz

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Joined: 12 Sep 2013
Posts: 19
Location: India

PostPosted: Mon Sep 07, 2015 2:15 pm    Post subject:
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Yes Rahul. The job was in abend state in CA7.

The request raised was to Cancel and Re-demand the job. Whilst the job was cancelled, and then re-demanded, my understanding was that it would have created a new generation. That too when the DISP Parm is NEW and not MOD.
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RahulG31

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Joined: 20 Dec 2014
Posts: 331
Location: USA

PostPosted: Mon Sep 07, 2015 2:21 pm    Post subject: Reply to: IGD17356I GDG RECLAIM REQUEST
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Ok. You need to read this: http://www-01.ibm.com/support/docview.wss?uid=isg1OA32968

Quote:
PROBLEM DESCRIPTION: If the job specifies a DD card with
GDS(+1) and the job terminates
abnormally such that the GDS does not
get rolled in then during a subsequent
re-execution of the same job, the
system will attempt to create the same
data set as when the job failed
earlier. The system will detect that
the GDS already exists and if the
system default of GDS_RECLAIM(YES) is
used, the system will reclaim the
previously created GDS. Owing to an
error in the code, if the user attempts
to write to this data set, the step
will complete with a RC of zero but the
data will not be written out.
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shiitiizz

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Joined: 12 Sep 2013
Posts: 19
Location: India

PostPosted: Mon Sep 07, 2015 2:27 pm    Post subject:
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Many Thanks Rahul, Yes that explains it. I found the below read useful too,

https://www-01.ibm.com/support/knowledgecenter/SSLTBW_2.1.0/com.ibm.zos.v2r1.idad400/roll.htm

Thanks once again for helping on this
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RahulG31

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Joined: 20 Dec 2014
Posts: 331
Location: USA

PostPosted: Mon Sep 07, 2015 2:34 pm    Post subject: Reply to: IGD17356I GDG RECLAIM REQUEST
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You're welcome :-)
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