Re: Interesting APAR OA27291 an undocumented change to GETMAIN Behavior in z/OS 1.10
- From: Kees.Vernooy@xxxxxxx (Vernooy, C.P. - SPLXM)
- Date: 5 Feb 2009 23:48:38 -0800
"Edward Jaffe" <edjaffe@xxxxxxxxxxxxxxxxxxx> wrote in message
news:<498B1C64.1030603@xxxxxxxxxxxxxxxxxxx>...
Knutson, Sam wrote:text.
http://www.ibm.com/support/docview.wss?uid=isg1OA27291
OA27291 is closed with some good information included in the APAR
our
Hopefully, people understand that this APAR doesn't "fix" the failing
programs. They still make erroneous assumptions about the initial
contents of the storage they acquire and are at risk of failing with
without UseZosV1R9Rules(Yes) coded.
What worries me is the fact that the fix sets default processing to
UseZosV1R9Rules(Yes).
You don't have to do anything to remain in the safe pre-1.10 mode, so
many customers will probably overlook this 1.10 enhancement.
How long will this mode remain supported (imbed and replicate's
toleration lifetime has ended too)? When will we have to go to 1.10
mode? IBM will want to end duplicate code paths at some moment (like
SECP). The advantages are clear and will become more pressing with
growing DB2 etc. systems, that will benefit more and more from the
consolidated DQE's. ISV's might be tempted to request keeping
UseZosV1R9Rules(Yes), i.e. remove the UseZosV1R9Rules(No), in stead of
solving their problems quickly.
I had rather seen the default UseZosV1R9Rules(No) and the (Yes) value
optional, so you will see it any time you scan your parmlib with z/OS
upgrades.
Kees.
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