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Bug 1237070 - sendmail dispatcher scripts blocks
Summary: sendmail dispatcher scripts blocks
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: sendmail
Version: 7.2
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Jaroslav Škarvada
QA Contact: Roman Žilka
URL:
Whiteboard:
Depends On:
Blocks: 1400961
TreeView+ depends on / blocked
 
Reported: 2015-06-30 10:17 UTC by Lubomir Rintel
Modified: 2017-08-01 12:42 UTC (History)
4 users (show)

Fixed In Version: sendmail-8.14.7-5.el7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2017-08-01 12:42:36 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
Suggested fix (729 bytes, text/plain)
2015-06-30 10:18 UTC, Lubomir Rintel 		no flags Details
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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2017:2197 0 normal SHIPPED_LIVE sendmail bug fix and enhancement update 2017-08-01 16:09:20 UTC

Description Lubomir Rintel 2015-06-30 10:17:36 UTC 
Description of problem:

Sendmail is known to behave terrible bug #439837 when it can not resolve its own hostname, to the point it blocks the service startup. Moreover, sendmail service restart is attempted on each connection activation.

This is terrible, because if DNS is needed for own hostname resolution, the activation of network connections prior to connection to the domain server stall.

The NetworkManager dispatcher scripts should never block for prolonged periods of time.

Version-Release number of selected component (if applicable):

sendmail-8.14.7-4.el7.x86_64
Comment 1 Lubomir Rintel 2015-06-30 10:18:58 UTC 
Created attachment 1044650 [details]
Suggested fix
Comment 5 Roman Žilka 2017-05-18 11:33:43 UTC 
QA: Verified on all archs.

********** sendmail-8.14.7-4.el7 (faulty):
# systemctl start sendmail
# vim /etc/resolv.conf
# vim /etc/hosts
# vim /etc/nsswitch.conf
# time getent ahosts $(hostname)

real    0m20.023s
user    0m0.001s
sys     0m0.002s
# time /etc/NetworkManager/dispatcher.d/10-sendmail iface up
Job for sendmail.service failed because a timeout was exceeded. See "systemctl status sendmail.service" and "journalctl -xe" for details.

real    1m30.301s
user    0m0.000s
sys     0m0.022s
# 

********** sendmail-8.14.7-5.el7 (fixed):
# systemctl start sendmail
# vim /etc/resolv.conf
# vim /etc/hosts
# vim /etc/nsswitch.conf
# time getent ahosts $(hostname)

real    0m20.023s
user    0m0.002s
sys     0m0.001s
# time /etc/NetworkManager/dispatcher.d/10-sendmail iface up

real    0m0.035s
user    0m0.002s
sys     0m0.018s
# sleep 2m; systemctl status sendmail
● sendmail.service - Sendmail Mail Transport Agent
   Loaded: loaded (/usr/lib/systemd/system/sendmail.service; enabled; vendor preset: disabled)
   Active: failed (Result: timeout) since Thu 2017-05-18 07:19:07 EDT; 36s ago
   (...)
#
Comment 6 errata-xmlrpc 2017-08-01 12:42:36 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://access.redhat.com/errata/RHBA-2017:2197
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