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Posted to log4j-dev@logging.apache.org by bu...@apache.org on 2007/03/23 15:36:32 UTC

DO NOT REPLY [Bug 41938] New: - LogFilePatternReceiver uses greedy matching in logFormat

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           Summary: LogFilePatternReceiver uses greedy matching in logFormat
           Product: Log4j
           Version: 1.2
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: chainsaw
        AssignedTo: log4j-dev@logging.apache.org
        ReportedBy: timothy.high@sknt.com


The log format pattern matching for the LogFilePatternReceiver uses a greedy
match algorithm in order to parse the logs. This means that it is unable to read
logs that use multiple bracket separators ("[]") in the log statements.

In the example provided (see the attached ZIP file):

19:11:14,304 DEBUG [AWT-EventQueue-1][admin1-ezhan0qo-5][EventIdGenerator] Id
generated: admin1-ezhan0qo-6, for user:admin1

The logFormat pattern "TIMESTAMP LEVEL [THREAD] [METHOD] [CLASS] MESSAGE" fails.
The reduced configuration "TIMESTAMP LEVEL [THREAD] MESSAGE" succeeds. However,
the THREAD appears as "AWT-EventQueue-1][admin1-ezhan0qo-5][EventIdGenerator"
rather than "AWT-EventQueue-1" (see screenshot in attachment). In both cases, it
appears that this is because the logFormat parser is using a greedy algorithm to
find the ending "]" character.

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DO NOT REPLY [Bug 41938] - LogFilePatternReceiver uses greedy matching in logFormat

Posted by bu...@apache.org.
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------- Additional Comments From timothy.high@sknt.com  2007-03-23 07:37 -------
Created an attachment (id=19780)
 --> (http://issues.apache.org/bugzilla/attachment.cgi?id=19780&action=view)
Log files, Chainsaw configuration and screenshot


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DO NOT REPLY [Bug 41938] - LogFilePatternReceiver uses greedy matching in logFormat

Posted by bu...@apache.org.
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timothy.high@sknt.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |WORKSFORME




------- Additional Comments From timothy.high@sknt.com  2007-05-21 13:56 -------
Yep, you're right! I somehow missed the lack of spacing (and jumped straight to
the most complicated conclusion). Thanks!

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DO NOT REPLY [Bug 41938] - LogFilePatternReceiver uses greedy matching in logFormat

Posted by bu...@apache.org.
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sdeboy@iname.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |CLOSED




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DO NOT REPLY [Bug 41938] - LogFilePatternReceiver uses greedy matching in logFormat

Posted by bu...@apache.org.
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------- Additional Comments From sdeboy@iname.com  2007-03-23 23:23 -------
It's not a problem the greedy matching of brackets - you don't have the right
logFormat.

I took the spaces out between thread/method/class in the logFormat (because your
client.log file doesn't contain spaces between those items) and it worked fine.
 Here's the logFormat I used:

TIMESTAMP LEVEL [THREAD][METHOD][CLASS] MESSAGE

If this addresses your issue, please close it.

Thanks

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