On Apr 23, 2008, at 2:02 AM, Tom Quarendon wrote:
I have a situation where some channel programs I'm executing seem to get getting "purged", and the ECBs are not being posted resulting in my program hanging when I wait on them.
PURGE and RESTORE are two complementary operations which are invoked by EXCP.
If your job gets scheduled for a swap, all I/O will be PURGEd (i.e., removed from any I/O queue, thereby stopping all such I/O), and placed on a queue prior to swap-out.
When swap-in is complete, all I/O on that queue will be RESTOREd (i.e., replaced in any I/O queue, thereby restarting all such I/O).
Check very carefully that your IOBs are properly and completely set- up for EXCP operations.
If there was a basic problem with PURGE and RESTORE then all the EXCP- based access methods would be failing, too. But they aren't, so the incompatibility is yours.
PURGE and RESTORE has been around since OS/360 MVT Rel. 20.1 and TSO, and that is a LONG time. Nearly FORTY years.
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