Though this is a z/VM mailing list, I hope someone will be able to shed
some light on this bizarre problem that I have difficulty explaining.

We defined a dataset that I think (!) we perhaps created as a HFS dataset.
We did not do anything else (no read or update)  with it. We had not set
up any ACF2 rules for it.

But somehow we are getting ACF2 violations on accesses from USS. When the
violations exceeded the limit, USS id was cancelled by ACF2 causing all
TCP/IP and USS dependent tasks to abend. We had to re-IPL the LPAR.

We had to delete the dataset before re-IPLing for fear of another
incident!

I am guessing that because we set it up as a HFS (unintentionally), any
access by backup jobs or via ISPF was considered as coming from USS. Since
the ACF2 rules were not set up, it caused violations and the consequent
results.

We do not remember if we set it up as a normal or HFS dataset. That
evidence is gone. But my theory is that it was set up as HFS with no ACF2
rules and any access to it was considered as coming from USS.

This is bizarre. We are splitting hair to find out why and how it
happened.

Any clues welcome :-)
__________________________________________
Ranga Nathan / CSG
Systems Programmer - Specialist; Technical Services;
BAX Global Inc. Irvine-California
Tel: 714-442-7591   Fax: 714-442-2840

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