Regular Expressions 101

Positive Lookbehind(?<=id=)

id=the literal text id= (case sensitive)

Group 1(.*)

.*any character (except for line terminators), repeated any number of times

Positive Lookahead(?=} Task)

} Taskthe literal text } Task (case sensitive)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?<=id=)(.*)(?=} Task)

Test String
New

[2022-11-05 00:37:34,687] ERROR WorkerSourceTask{id=log_events-0} Task is being killed and will not recover until manually restarted (org.apache.kafka.connect.runtime.WorkerTask:187)
[2022-11-05 00:47:46,495] ERROR WorkerSourceTask{id=log_map-0} Task is being killed and will not recover until manually restarted (org.apache.kafka.connect.runtime.WorkerTask:187)

Regular Expression

Test StringNew

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Test String
New

Extraction
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