Bug 889299 - missing data in blackbox debug output
missing data in blackbox debug output
Status: CLOSED ERRATA
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: libqb (Show other bugs)
6.4
Unspecified Unspecified
medium Severity medium
: rc
: ---
Assigned To: David Vossel
Cluster QE
:
Depends On:
Blocks: 883504
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Reported: 2012-12-20 13:00 EST by David Vossel
Modified: 2013-11-21 06:52 EST (History)
5 users (show)

See Also:
Fixed In Version: libqb-0.16.0-2.el6
Doc Type: Bug Fix
Doc Text:
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Environment:
Last Closed: 2013-11-21 06:52:48 EST
Type: Bug
Regression: ---
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RHEL 7.3 requirements from Atomic Host:
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Description David Vossel 2012-12-20 13:00:20 EST
Description of problem:

Blackbox output will not contain logging information if logging format specifies string len/precision.

For example.

If we use the format log("test [%.10s] - [%s]", "some_text", some_more_text"), every argument including and after the "%.10s" will be empty.

So the output would be "test [] - []" when we would expect "test [some_text] - [some_more_text]

This affects the usefulness of blackbox output for debugging purposes.  This specifically affects Pacemaker's use of blackbox.


Version-Release number of selected component (if applicable):
0.14.2-3

How reproducible:
Always.
Comment 4 David Vossel 2013-01-03 15:41:12 EST
I've tested the upstream patches, and it appears that they resolve the use-case in the description. However, while testing the patches I ran across another very similar situation where blackbox output is being truncated.

In my pacemaker log file I have the following msg.

Jan 03 20:01:49 [32253] 18builder pacemakerd:    debug: update_node_processes: 	Node 18builder now has process list: 00000000000000000000000000000002 (was 00000000000000000000000000000000)

but, in the blackbox output the same message is truncated to look like this.

debug   Jan 03 20:01:49 update_node_processes(620):0: Node 18builder now has process list: 00000000000000000000000000000

This situation needs to be resolved as well.

-- Vossel
Comment 5 Angus Salkeld 2013-01-09 04:35:43 EST
(In reply to comment #4)
> I've tested the upstream patches, and it appears that they resolve the
> use-case in the description. However, while testing the patches I ran across
> another very similar situation where blackbox output is being truncated.
> 
> In my pacemaker log file I have the following msg.
> 
> Jan 03 20:01:49 [32253] 18builder pacemakerd:    debug:
> update_node_processes: 	Node 18builder now has process list:
> 00000000000000000000000000000002 (was 00000000000000000000000000000000)
> 
> but, in the blackbox output the same message is truncated to look like this.
> 
> debug   Jan 03 20:01:49 update_node_processes(620):0: Node 18builder now has
> process list: 00000000000000000000000000000
> 
> This situation needs to be resolved as well.
> 
> -- Vossel

this is the upstream patch to fix this issue: https://github.com/asalkeld/libqb/commit/739faa54fea57152d61e4c70bda3349982bac627
Comment 15 errata-xmlrpc 2013-11-21 06:52:48 EST
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.

http://rhn.redhat.com/errata/RHBA-2013-1634.html

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