*Synopsis*: Subshell doesn't exit, holds pipe open preventing callers from
exiting
CR 6881017 changed on Oct 28 2009 by <User 1-5HNZ8F>
=== Field ============ === New Value ============= === Old Value =============
Commit to Fix in Build snv_128 snv_127
Fixed in Build snv_128
Status 8-Fix Available 7-Fix in Progress
====================== =========================== ===========================
*Change Request ID*: 6881017
*Synopsis*: Subshell doesn't exit, holds pipe open preventing callers from
exiting
Product: solaris
Category: shell
Subcategory: korn93
Type: Defect
Subtype:
Status: 8-Fix Available
Substatus:
Priority: 2-High
Introduced In Release: solaris_nevada
Introduced In Build: snv_72
Responsible Engineer: <User 1-7MTUEB>
Keywords: oss-request, oss-sponsor
=== *Description* ============================================================
The following scenario hangs with snv_122, 100% reproducible:
Create a script hangit:
-----
#!/bin/ksh
( sleep 100000 </dev/null >/dev/null 2>&1 & )
exit 0
-----
Run the following command:
hangit | tee -a /tmp/log
The hang can be eliminated either by removing the "exit 0" line (?!?), or by
redirecting the subshell output to /dev/null.
This is pretty nasty. I've whittled it down to this simple case but am seeing
it in a much more subtle and complex environment where there are several
intermediate calling scripts which have exited and eventually the parent pipes
the output and hangs on the open pipe. It was hard to track down.
*** (#1 of 1): 2009-09-11 01:13:39 GMT+00:00 <User 1-5Q-13134>
=== *Public Comments* ========================================================
Also filed at:
http://bugs.grommit.com/show_bug.cgi?id=631
I was requested to open up this issue in bugster by Roland Mainz.
*** (#1 of 1): 2009-09-11 01:14:51 GMT+00:00 <User 1-5Q-13134>
*** Last Edit: 2009-09-11 01:16:27 GMT+00:00 <User 1-5Q-13134>
=== *Workaround* =============================================================
=== *Additional Details* =====================================================
Targeted Release: solaris_nevada
Commit To Fix In Build: snv_128
Fixed In Build: snv_128
Integrated In Build:
Verified In Build:
See Also: 6437624, 6793763
Duplicate of:
Hooks:
Hook1:
Hook2:
Hook3:
Hook4:
Hook5: <email address omitted>
Hook6: <email address omitted>
Program Management:
Root Cause: Insufficient Testing
Fix Affects Documentation: No
Fix Affects Localization: No
=== *History* ================================================================
Date Submitted: 2009-09-11 01:13:38 GMT+00:00
Submitted By: <User 1-5Q-13134>
Status Changed Date Updated Updated By
3-Accepted 2009-09-11 07:00:53 GMT+00:00 <User 1-16P5I3>
7-Fix in Progress 2009-10-23 18:45:03 GMT+00:00 <User 1-7MTUEB>
8-Fix Available 2009-10-28 18:23:39 GMT+00:00 <User 1-5HNZ8F>
=== *Service Request* ========================================================
Impact: Critical
Functionality: Secondary
Severity: 2
Product Name: solaris
Product Release: solaris_nevada
Product Build: snv_122
Operating System: snv_122
Hardware: x86
Submitted Date: 2009-09-11 01:13:39 GMT+00:00
=== *Multiple Release (MR) Cluster* - 0 ======================================
