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!

Accelerating Observability as Code with the Splunk AI Assistant

We’ve seen in previous posts what Observability as Code (OaC) is and how it’s now essential for managing ...

Integrating Splunk Search API and Quarto to Create Reproducible Investigation ...

 Splunk is More Than Just the Web Console For Digital Forensics and Incident Response (DFIR) practitioners, ...

Congratulations to the 2025-2026 SplunkTrust!

Hello, Splunk Community! We are beyond thrilled to announce our newest group of SplunkTrust members!  The ...