Problem Note 4095: SAS may freeze after issuing a Unix system command or when starting ITSV
SAS may hang after issuing any system command on any Unix host.
This has been reported when trying to invoke SAS/ITSV.
If you have a filename pipe, call system, system function X command, or
an SCL function that results in a Unix command being executed from
within SAS, it is possible for SAS to hang.
This is because SAS sets up a signal handler for the SIGCHILD signal
that results when the child process ends, if the process ends prior to
the signal handler being implemented via a sigaction() call, then SAS
misses the SIGCHILD signal and is suspended in a wait state.
A Technical Support hot fix for Release 8.1 TSLEVEL TS1M0 for this
issue is available at:
http://www.sas.com/techsup/download/hotfix/81_sbcs_prod_list.html#004095
This problem is also fixed in Release 8.2.
Operating System and Release Information
| SAS System | Base SAS | 64-bit Enabled Solaris | 8.1 TS1M0 | 8.2 TS2M0 |
| Solaris | 8.1 TS1M0 | 8.2 TS2M0 |
| ABI+ for Intel Architecture | 8.1 TS1M0 | 8.2 TS2M0 |
| IRIX | 8.1 TS1M0 | 8.2 TS2M0 |
| 64-bit Enabled AIX | 8.1 TS1M0 | 8.2 TS2M0 |
| HP-UX | 8.1 TS1M0 | 8.2 TS2M0 |
| 64-bit Enabled HP-UX | 8.1 TS1M0 | 8.2 TS2M0 |
| AIX | 8.1 TS1M0 | 8.2 TS2M0 |
| Tru64 UNIX | 8.1 TS1M0 | 8.2 TS2M0 |
*
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.
| Type: | Problem Note |
| Priority: | medium |
| Topic: | System Administration ==> Installation
|
| Date Modified: | 2002-05-14 14:41:10 |
| Date Created: | 2001-01-11 18:13:22 |
