topic Re: "Invalid Regex: no named extraction" in the interactive field extractor in Splunk Search

"Invalid Regex: no named extraction" in the interactive field extractor

dinh — Sat, 30 Jan 2010 08:42:03 GMT

What is wrong with this regex?

(?P<AUTH_PIN_TYPE>[^ ]+)( [^ ]+){2}$

The interactive field extractor gives this error: Invalid regex: no named extraction at position 24 (i.e., "( [^ ]+){2..."). Expected "(?Ppattern)"

Re: "Invalid Regex: no named extraction" in the interactive field extractor

hulahoop — Sat, 30 Jan 2010 08:51:38 GMT

Can you provide more details? What are you trying to match?

Re: "Invalid Regex: no named extraction" in the interactive field extractor

GpMidi — Sun, 31 Jan 2010 01:16:45 GMT

I belive you need to use all named captures. ie (?P...)

Re: "Invalid Regex: no named extraction" in the interactive field extractor

gkanapathy — Mon, 01 Feb 2010 16:25:24 GMT

As far as I can see, and testing in Splunk 4.0.8 using rex, EXTRACT in props.conf, and a REPORT clause, there appears to be nothing wrong with it (assuming it correctly captures your fields). Where are you seeing this error?

Update: in the IFE, as GpMidi says, you can use only named captures, i.e., implicit captures like (...) are not accepted. If you just wish to group (without an implicit capture), use (?:...) instead. So your regex in this case would have to be:

(?P<AUTH_PIN_TYPE>[^ ]+)(?: [^ ]+){2}$

Re: "Invalid Regex: no named extraction" in the interactive field extractor

dinh — Tue, 02 Feb 2010 01:05:56 GMT

I see it on Splunk 4.0.9(74233) when I put it in the interactive field extractor.

Re: "Invalid Regex: no named extraction" in the interactive field extractor

dinh — Tue, 02 Feb 2010 01:07:30 GMT

blah blah blah MATCH_ME foo bar(end of line)