Bug 188182

Summary:	NetworkManager can't find network devices and warns: "nm_add_initial_devices (): could not find existing networking devices: The maximum number of pending replies per connection has been reached"
Product:	[Fedora] Fedora	Reporter:	Myk Melez <myk>
Component:	NetworkManager	Assignee:	Dan Williams <dcbw>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	5	CC:	dbaron
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	0.6.x	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-11-01 02:54:37 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Myk Melez 2006-04-06 18:54:04 UTC

Description of problem:

When I awoke my FC5 laptop this morning after arriving in the office,
NetworkManager was unable to find any network devices.  I tried unchecking and
then rechecking the "Enable Networking" option in the applet's context menu,
which caused NetworkManager to write the following message to the system log:

Apr  6 11:48:09 myk NetworkManager: <WARNING>    nm_add_initial_devices ():
could not find existing networking devices: The maximum number of pending
replies per connection has been reached

I then tried restarting NetworkManager via "sudo service NetworkManager stop;
sudo service NetworkManager start", and that worked: NetworkManager was once
again able to see my wired and wireless network devices.

Version-Release number of selected component (if applicable): 0.6.0-3

How reproducible: this is the first time it has happened

Additional Info:

[myk@myk ~]$ uptime
 11:57:24 up 9 days,  1:57,  6 users,  load average: 0.10, 0.74, 0.87

I regularly travel between my home and the office, putting my laptop to sleep
for the trip.  I also put the laptop to sleep when going between my desk in the
office (where the laptop has wired access) and other parts of the building for
meetings (where I use the wireless connection).

Comment 1 David Baron 2006-07-21 19:20:47 UTC

I've started seeing this a *lot* (pretty much every time I come into the office,
start in a meeting, as I've been doing every day this week, and then move to my
desk) when switching from wireless to wired.  I suspect something in recent
NetworkManager updates made this worse; restarting NetworkManager made things
work again.

Myk mentioned that he's recently been seeing it a lot more often.

Comment 2 Dan Williams 2007-11-01 02:54:37 UTC

Fixed in FC6 I'm pretty sure; it's running up against an obscenely low D-Bus
pending call limit.  The fix is to either boost the dbus limit or boost the
limit in the NM service config file.