Splunk Search

transform negative match

jhedgpeth
Path Finder

I'm trying to send certain events ("IdcServerThread" stuff) to nullQueue unless there's a specific pattern in it (the "verbose:" stuff). I'm not able to perform a positive match on all the other possibilities, so I'm trying a negative lookahead. What am I doing wrong?

KEEP LINE:

system  10.28 18:25:05.078    IdcServerThread-24       Configuring tracing verbose: false; sections: system, indexer, requestaudit

DISCARD LINE:

requestaudit    10.28 18:25:01.753   IdcServerThread-23 Ending request thread leaving behind 0 active request threads

props.conf

[source::.../*stub/etc/log]
sourcetype = stellent_log
TRANSFORMS-stellent = no_stellent_verbose

transforms.conf

[no_stellent_verbose]
REGEX = IdcServerThread-\d+\s+(?!Configuring)
DEST_KEY = queue
FORMAT = nullQueue
Tags (1)
1 Solution

southeringtonp
Motivator

You can match on everything, then override it for the subset you want to keep.

Take a look at:
http://www.splunk.com/base/Documentation/4.1.5/Admin/Routeandfilterdata#Keep_specific_events_and_dis...

transforms.conf:

[stellent_setnull]
REGEX = IdcServerThread
DEST_KEY = queue
FORMAT = nullQueue

[stellent_keep]
REGEX = IdcServerThread[\d\-\s]+Configuring
DEST_KEY = queue
FORMAT = indexQueue

props.conf

[source::.../*stub/etc/log]
sourcetype = stellent_log
TRANSFORMS-stellent = stellent_setnull, stellent_keep

The indexer will set all matching events to nullQueue, but then reset the "verbose" ones back to indexQueue.

View solution in original post

southeringtonp
Motivator

You can match on everything, then override it for the subset you want to keep.

Take a look at:
http://www.splunk.com/base/Documentation/4.1.5/Admin/Routeandfilterdata#Keep_specific_events_and_dis...

transforms.conf:

[stellent_setnull]
REGEX = IdcServerThread
DEST_KEY = queue
FORMAT = nullQueue

[stellent_keep]
REGEX = IdcServerThread[\d\-\s]+Configuring
DEST_KEY = queue
FORMAT = indexQueue

props.conf

[source::.../*stub/etc/log]
sourcetype = stellent_log
TRANSFORMS-stellent = stellent_setnull, stellent_keep

The indexer will set all matching events to nullQueue, but then reset the "verbose" ones back to indexQueue.

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!

How Splunk AI Assistant Is Transforming Investigations: Insights from .conf26

At .conf26 in Denver, I spent much of my time in conversation with Splunk customers about Splunk AI Assistant. ...

Make Your Machine Data AI-Ready in Splunk

Every team is getting ready for AI agents.   Thursday, November 12, 2026  |  11AM  PST / 2PM EST   ...

Splunk Asynchronous Forwarding Explained

Splunk asynchronous forwarding is often misunderstood as simply setting autoLBVolume. That is not quite right. ...