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Bug 200205 - snmp backend times out
Summary: snmp backend times out
Alias: None
Product: Fedora
Classification: Fedora
Component: cups
Version: 5
Hardware: athlon
OS: Linux
Target Milestone: ---
Assignee: Tim Waugh
QA Contact:
Depends On:
Blocks: FC6Target
TreeView+ depends on / blocked
Reported: 2006-07-26 07:04 UTC by Joachim Backes
Modified: 2007-11-30 22:11 UTC (History)
0 users

Fixed In Version: 1.2.2-1.8
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2006-08-30 16:08:59 UTC

Attachments (Terms of Use)
strace /usr/lib/cups/backend/snmp (deleted)
2006-07-28 04:36 UTC, Joachim Backes
no flags Details
CUPS_DEBUG_LEVEL=3 /usr/lib/cups/backend/snmp >snmp.log 2>&1 (deleted)
2006-07-31 05:01 UTC, Joachim Backes
no flags Details
CUPS_DEBUG_LEVEL=3 /usr/lib/cups/backend/snmp (deleted)
2006-08-01 13:10 UTC, Joachim Backes
no flags Details
CUPS_DEBUG_LEVEL=3 strace /usr/lib/cups/backend/snmp 2>&1 | tee snmp.log (deleted)
2006-08-02 04:51 UTC, Joachim Backes
no flags Details

Description Joachim Backes 2006-07-26 07:04:18 UTC
Description of problem:
Trying to admin my cps server by "firefox localhost:613". The brwoser window is
displayed, but if clicking the "Administration" tab lets it hang. Inspecting
/var/log/cups/error_log show 3 lines:

W [26/Jul/2006:09:11:00 +0200] [cups-deviced] Backend "snmp" did not respond
within 30 seconds!
W [26/Jul/2006:09:11:18 +0200] [cups-deviced] Backend "snmp" did not respond
within 30 seconds!
W [26/Jul/2006:09:11:29 +0200] [cups-deviced] Backend "snmp" did not respond
within 30 seconds!

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

How reproducible:
Each time

Steps to Reproduce:
1.Start firefox on the cups server: "forefox localhost:631"
2.Click the "Adminstration" tab
Actual results:
It hangs

Expected results:
open the admin window or the root authentification prompt

Additional info:--

Comment 1 Tim Waugh 2006-07-27 13:22:14 UTC
A new CUPS package for FC5 was made available yesterday:

Please try that package (just 'yum update') and let me know if the problem is
still present.


Comment 2 Joachim Backes 2006-07-27 13:37:06 UTC
Has already been installed (cups-1.2.2-1.1), but did not help.
Tailing /var/log/cups/error_log:

I [27/Jul/2006:15:46:12 +0200] Started "/usr/lib/cups/cgi-bin/admin.cgi" (pid=3752)
I [27/Jul/2006:15:46:12 +0200] Started "/usr/lib/cups/daemon/cups-deviced"
W [27/Jul/2006:15:46:45 +0200] [cups-deviced] Backend "snmp" did not respond
within 30 seconds!

Comment 3 Tim Waugh 2006-07-27 15:59:07 UTC
Please show me the full output of: time /usr/lib/cups/backend/snmp


Comment 4 Joachim Backes 2006-07-28 04:34:08 UTC
It seems that "time /usr/lib/cups/backend/snmp" hangs or is cpu busy:

INFO: Using default SNMP Address @LOCAL
INFO: Using default SNMP Community public

If I stop it after waiting some time by Ctrl+C, then:

real    1m0.775s
user    0m0.000s
sys     0m0.000s

It consumed a lot of time.

I did a "strace /usr/lib/cups/backend/snmp". The output will be attached.

Comment 5 Joachim Backes 2006-07-28 04:36:17 UTC
Created attachment 133214 [details]
strace /usr/lib/cups/backend/snmp

strace /usr/lib/cups/backend/snmp

Comment 6 Tim Waugh 2006-07-28 15:46:43 UTC
Please try this test update:

You should be able to install this using the command:

  yum --enablerepo=updates-testing 'cups*'

as root.  Does the backend still take a long time?  If so, please show me the
snmp.log from:

  CUPS_DEBUG_LEVEL=3 /usr/lib/cups/backend/snmp 2>&1 >snmp.log

with the new (1.2.2-1.2) packages installed.  Thanks.

Comment 7 Joachim Backes 2006-07-31 04:58:59 UTC

did not help - hangs as before.

The output of CUPS_DEBUG_LEVEL=3 /usr/lib/cups/backend/snmp >snmp.log 2>&1 has
been attached.

Comment 8 Joachim Backes 2006-07-31 05:01:04 UTC
Created attachment 133304 [details]
CUPS_DEBUG_LEVEL=3 /usr/lib/cups/backend/snmp >snmp.log 2>&1

Comment 9 Tim Waugh 2006-08-01 13:02:42 UTC
Please try 1.2.2-1.3 from here:

It contains a small change that I hope will fix it.

Comment 10 Joachim Backes 2006-08-01 13:09:51 UTC

I'm sorry, but still hangs. Have attached the output of
CUPS_DEBUG_LEVEL=3 /usr/lib/cups/backend/snmp

Comment 11 Joachim Backes 2006-08-01 13:10:46 UTC
Created attachment 133395 [details]
CUPS_DEBUG_LEVEL=3 /usr/lib/cups/backend/snmp

Comment 12 Tim Waugh 2006-08-01 13:54:02 UTC
Hmm.  Please try this:

CUPS_DEBUG_LEVEL=3 strace /usr/lib/cups/backend/snmp 2>&1 | tee snmp.log

and attach the resulting snmp.log.  Thanks.

Comment 13 Joachim Backes 2006-08-02 04:51:34 UTC
Created attachment 133460 [details]
CUPS_DEBUG_LEVEL=3 strace /usr/lib/cups/backend/snmp 2>&1 | tee snmp.log

Comment 14 Tim Waugh 2006-08-02 16:22:02 UTC
Please try 1.2.2-1.4 from here:

It contains another small change, and hopefully this really is the fix.

Comment 15 Joachim Backes 2006-08-03 04:44:39 UTC

you fix seems to solve my problem, but not completely:

The printer adminstration does no more hang - now, I can modify printers by the
"Modify printer" button.

But: trying to modify the printer options by "Set printer options" fails with
the message "Error:

    Not Found


I cannot imagine what this message means!

Comment 16 Tim Waugh 2006-08-03 09:10:52 UTC
I think we've finally found the fix to the original problem them (great!).  I've
filed a report about this upstream:

Please file a separate bugzilla report about the "set printer options" problem,
as it needs to be tracked separately.  Thanks.

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