Bug 622468

Summary:	net-analyzer/nrpe-3.1.1: /etc/init.d/nrpe does not stop all nrpe processes
Product:	Gentoo Linux	Reporter:	Tomáš Mózes <hydrapolic>
Component:	Current packages	Assignee:	Sysadmin Bugs <sysadmin>
Status:	RESOLVED INVALID
Severity:	normal	CC:	mjo
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Tomáš Mózes 2017-06-22 12:06:07 UTC

During the glibc update I noticed that /etc/init.d/nrpe does not stop all nrpe processes.

How to simulate:
/etc/init.d/nrpe start
schedule all services check on that host
ps ax | grep nrpe -> shows multiple processes
/etc/init.d/nrpe stop
ps ax | grep nrpe -> some still running

Should this be reported upstream or we handle it some way?

Comment 1 Michael Orlitzky gentoo-dev

2017-06-22 13:38:43 UTC

Which processes are left running? The main daemon process and its children (i.e. what get created by /etc/init.d/nrpe start) should be killed by the corresponding "stop". Does that fail, or is it some other processes that got created in the meantime that stick around?

Comment 2 Tomáš Mózes 2017-06-22 14:25:25 UTC

# ps auxww | grep nrpe
nagios    1259  0.0  0.0  25904  2432 ?        Ss   16:14   0:00 /usr/bin/nrpe -c /etc/nagios/nrpe.cfg --daemon
nagios    3196  0.0  0.0  25904  2948 ?        S    16:17   0:00 /usr/bin/nrpe -c /etc/nagios/nrpe.cfg --daemon
nagios    3242  3.0  0.1  26592  4156 ?        S    16:17   0:00 /usr/bin/nrpe -c /etc/nagios/nrpe.cfg --daemon
nagios    3251  3.0  0.1  26592  4156 ?        S    16:17   0:00 /usr/bin/nrpe -c /etc/nagios/nrpe.cfg --daemon
nagios    3259  0.0  0.0  26592  2084 ?        S    16:17   0:00 /usr/bin/nrpe -c /etc/nagios/nrpe.cfg --daemon
nagios    3272  0.0  0.0  26592  2084 ?        S    16:17   0:00 /usr/bin/nrpe -c /etc/nagios/nrpe.cfg --daemon

# /etc/init.d/nrpe stop
 * Stopping nrpe ...      

# /etc/init.d/nrpe status
 * status: stopped

# ps auxww | grep nrpe
nagios    3196  0.0  0.0  25904  2948 ?        S    16:17   0:00 /usr/bin/nrpe -c /etc/nagios/nrpe.cfg --daemon

Comment 3 Michael Orlitzky gentoo-dev

2017-07-15 19:17:09 UTC

Do any of the upstream init files (from the startup directory) fare any better? I'm not sure what the problem is, but I'm planning on sending our simplified init script upstream and don't want to make anything worse.

Comment 4 Tomáš Mózes 2017-07-17 04:48:59 UTC

Seems like it's fixed in 3.2.0 as I cannot reproduce it any more. The problem was with longer running checks when nrpe forked a few new processes (for example when forcing a check of all services on a host) and during that time I did nrpe restart (after upgrade).