Splunk Search

extract fields in log4j files

arjangoos
Path Finder

Hi,

I want to make a timechart of the different errors in my application. To do this I need a fieldextractions.

the log4j format is like this:
10-19@09:25:45 ERROR rss.AbstractPostcodeBasedFeedPanel - Failed to load feeds from: [http://10.9.1.192/Cms.Backend/wscmsrssservice.asmx/GetBekendmakingenByPostcode?pPostcode=3071AS]
nl.rotterdam.ioo.mijnloket.homepage.util.rss.UnableToCreateSyndFeedListException: java.net.SocketTimeoutException: Read timed out

So I want the time (10-19@09:25:45) | type of message (ERROR) | the text between ERROR and - | and the text between : and : | and the text between : and :

How can I do that. The field extraction for time and type of messages is simple but can you help me with the other extractions

Kind regards

Tags (1)
0 Karma

sdaniels
Splunk Employee
Splunk Employee

Splunk will automatically recognize the standard output for log4j. Can you use the default format? From our docs:

log4j   Log4j standard output produced by any J2EE server using log4j   2005-03-07 16:44:03,110 53223013 [PoolThread-0] INFO [STDOUT] got some property...

With a non-standard format you could use the Interactive Field Extractor capabilities to easily extract fields and create the regex for you automatically

http://docs.splunk.com/Documentation/Splunk/5.0/Knowledge/ExtractfieldsinteractivelywithIFX

I would recommend taking a look at this as well for future use of log4j and Splunk: https://github.com/damiendallimore/SplunkJavaLogging

0 Karma

sdaniels
Splunk Employee
Splunk Employee

Is ERROR and the '-' always going to be in the log?

0 Karma

arjangoos
Path Finder

At this time it is not possible to change the log4j format. So I think I need to use the interactive Field Extrator. But I am not able to get the result I want.

ERROR rss.AbstractPostcodeBasedFeedPanel -

What is the regex to get the text between ERROR and -.

Kind regards,

Arjan

0 Karma
Got questions? Get answers!

Join the Splunk Community Slack to learn, troubleshoot, and make connections with fellow Splunk practitioners in real time!

Meet up IRL or virtually!

Join Splunk User Groups to connect and learn in-person by region or remotely by topic or industry.

Get Updates on the Splunk Community!

Mastering Threat Intelligence in ES 8.5, Splunk AI Assistant v2, and More from Splunk ...

Splunk Lantern is Splunk’s customer success center that provides practical guidance from Splunk experts on key ...

Break the Build: Inside the KubeDoom Lounge at .conf26

    You step up to the machine. The pixelated corridors of a certain 1993 FPS load in front of you, EMP Pulse ...

Splunk Auto Ingestion Parallel Pipeline Scaling

Why this feature matters Many Splunk environments experience ingestion pressure long before the host is fully ...