Bug 1263505

Summary: Heavy program map usage can lead to a hang
Product: Red Hat Enterprise Linux 6 Reporter: Ian Kent <ikent>
Component: autofsAssignee: Ian Kent <ikent>
Status: CLOSED ERRATA QA Contact: xiaoli feng <xifeng>
Severity: medium Docs Contact:
Priority: high    
Version: 6.7CC: eguan, ikent, salmy, yoyang
Target Milestone: rcKeywords: Regression
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: autofs-5.0.5-120.el6 Doc Type: Bug Fix
Doc Text:
Cause: Changes made for bug 1160446 added a function call that was out of order and could introduce a deadlock in the process created to execute a program map. Consequence: This caused the program map to not be executed and the required mount to not be done as well as leaving stale process that can't complete. Fix: Move the out of order function call to the correct location in the program map execution module. Result: Program map executed, required mount attempted without leaving blocked stale processes.
 Story Points: ---
Clone Of:
: 1263508 (view as bug list) Environment:
Last Closed: 2016-05-11 00:51:30 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1263508, 1268411    
Attachments:
Description Flags
Patch - fix out of order call in program map lookup none

Description Ian Kent 2015-09-16 02:36:21 UTC 
Description of problem:

Due to a change to program map environment variable naming
that was included in RHEL-6.7 heavy program map usage can
lead to an automount(8) hang.

Version-Release number of selected component (if applicable):
autofs-5.0.5-113.

The problem was introduced in autofs revision 111.
Comment 1 Ian Kent 2015-09-16 02:37:15 UTC 
Created attachment 1073881 [details]
Patch - fix out of order call in program map lookup

Upstream fix, still needs to be back ported.
Comment 3 Ian Kent 2015-09-17 08:31:24 UTC 
As posted XuWang in the rhel-7 counterpart of this bug:

This topic include the detail info about this bug.

http://www.spinics.net/lists/autofs/msg01050.html
Comment 10 errata-xmlrpc 2016-05-11 00:51:30 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-0934.html