On Fri, 28 Mar 2008 12:03:54 -0500, Mark Zelden wrote:

>Yes.  That eliminates the COMPRESS issue or the problem you might
>run into if the library takes an additional extent.  The second problem
>was fixed about 15 years ago in MVS/ESA V4.   JES2 recognizes this
>condition via I/O error and then will close and reopen the DD for
>all converter tasks.    Actually, knowing this works makes me think
>that the "trick" mentioned an an earlier post (running jobs that point
>to a nonexistent or another PROCxx DD) could work to fix the problem
>without having to bounce JES2.   But I don't know if there is some
>extra code in the fix from 15 years ago that handles that situation
>differently.
>
>Mark
>--

I was going to contribute to this before, to correct this statement you made, 
Mark.  Having had the actual hands-on experience of a JES2 proclib going 
away "in anger", I know that the trick of running a job pointing to a non-
existing JES2 PROCxx DD actually works - IF THE PROCLIB DATA SETS ARE ON 
THE SAME VOLUME AS BEFORE.  JES2 will CLOSE and reOPEN the PROCnn 
concatenation, and so long as the proclib data sets are on the exact same 
VOLUME, new extent information is built and JES2 is happy.

Brian

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