When an active process in a z/OS environment is interrupted in the middle of processing, it can end up in a loop. The loop occurs if the process is interrupted while there is a pending asynchronous I/O request. An interruption is most commonly triggered by pressing the key that is assigned as the attention-interrupt key on your terminal or from a client session in which someone simultaneiously presses CTRL+BREAK.

You can set the SAS^® system option SYNCHIO to circumvent this problem. This option should be set in the z/OS session.

Select the Hot Fix tab in this note to access the hot fix for this issue.

Operating System and Release Information

Product Family	Product	System	SAS Release
			Reported	Fixed*
SAS System	Base SAS	z/OS	9.2 TS2M0	9.2 TS2M2

* For software releases that are not yet generally available, the Fixed Release is the software release in which the problem is planned to be fixed.

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A fix for this issue for Base SAS 9.21 is available at:

http://ftp.sas.com/techsup/download/hotfix/HF2/A01.html#36602

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A process in a z/OS operating environment that is prematurely interrupted might remain active and consumes CPU resources. This happens if the interruption occurs while there is a pending asynchronous I/O request.

Type:	Problem Note
Priority:	high

Date Modified:	2009-09-17 14:03:36
Date Created:	2009-07-23 12:32:53