*Synopsis*: Subshell doesn't exit, holds pipe open preventing callers from
exiting
CR 6881017 changed on Sep 11 2009 by <User 1-5Q-1267>
=== Field ============ === New Value ============= === Old Value =============
Introduced in Release solaris_nevada
====================== =========================== ===========================
*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: 3-Accepted
Substatus:
Priority: 2-High
Introduced In Release: solaris_nevada
Introduced In Build:
Responsible Engineer: <User 1-16P5I3>
Keywords:
=== *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:
Commit To Fix In Build:
Fixed In Build:
Integrated In Build:
Verified In Build:
See Also:
Duplicate of:
Hooks:
Hook1:
Hook2:
Hook3:
Hook4:
Hook5:
Hook6:
Program Management:
Root Cause:
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>
=== *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 ======================================
