Knowledge Management

How to extract field using rex command

philgopaul
New Member

Hi,

I have this sample log and I want to extract the request ID value after the period. Each of those numbers are unique in my log file.

Timeout sending message for request ID.140445678

I've tried various ways but cannot come up with working rex command that would extract those values as a field.

... | rex field=_raw "request <(?w+)>"

Any assistance would be awesome, thanks so much.

Tags (1)
0 Karma

woodcock
Esteemed Legend

Try this:

... | rex "(?<request>\d+)[\r\n\s]*$"
0 Karma

vinod94
Contributor

You can try this,

| makeresults 
| eval data="Timeout sending message for request ID.140445678" 
| rename data as _raw 
| rex "request\sID\.(?P<request_id>.*)"
0 Karma

renjith_nair
Legend

@philgopaul ,

Try

|rex field=_raw "request ID\.(?<request_id>\d+)"
---
What goes around comes around. If it helps, hit it with Karma 🙂
0 Karma
Get Updates on the Splunk Community!

Application management with Targeted Application Install for Victoria Experience

  Experience a new era of flexibility in managing your Splunk Cloud Platform apps! With Targeted Application ...

Index This | What goes up and never comes down?

January 2026 Edition  Hayyy Splunk Education Enthusiasts and the Eternally Curious!   We’re back with this ...

Splunkers, Pack Your Bags: Why Cisco Live EMEA is Your Next Big Destination

The Power of Two: Splunk &#43; Cisco at "Ludicrous Scale"   You know Splunk. You know Cisco. But have you seen ...