# Warning: regular expression has redundant nested repeat operator in grok-pure.rb file
**URL:** https://discuss.elastic.co/t/warning-regular-expression-has-redundant-nested-repeat-operator-in-grok-pure-rb-file/368027
**Category:** Logstash
**Created:** [September 30, 2024, 2:40pm UTC](https://discuss.elastic.co/t/warning-regular-expression-has-redundant-nested-repeat-operator-in-grok-pure-rb-file/368027 "2024-09-30T14:40:44Z")
**Posts on this page:** 1
**Page:** 1
### Author:  [@Mahesh\_Kumar1](https://discuss.elastic.co/u/Mahesh_Kumar1)
#### Post date: [September 30, 2024, 2:40pm UTC](https://discuss.elastic.co/t/warning-regular-expression-has-redundant-nested-repeat-operator-in-grok-pure-rb-file/368027/1 "2024-09-30T14:40:44Z")
After migration to the logstash 8.xx version i have a new warning while running the logstash server. How to fix it??
"/logstash-8.15.1/vendor/bundle/jruby/3.1.0/gems/jls-grok-0.11.5/lib/grok-pure.rb:127: warning: regular expression has redundant nested repeat operator \*
/(\<(?NONNEGINT:syslog\_pri\b(?:[0-9]+)\b)\>)?((?:\s\*))?((?SYSLOGTIMESTAMP:syslog\_timestamp\_original(?:\b(?:[Jj]an(?:uary|uar)?|[Ff]eb(?:ruary|ruar)?|Mm
?r(?:ch|z)?|[Aa]pr(?:il)?|[Mm]a(?:y|i)?|[Jj]un(?:e|i)?|[Jj]ul(?:y|i)?|[Aa]ug(?:ust)?|[Ss]ep(?:tember)?|Oo?t(?:ober)?|[Nn]ov(?:ember)?|[Dd]e(?:c|z)(?:ember)?)\b)
+(?:(?:(?:0[1-9])|(?:[12][0-9])|(?:3[01])|[1-9])) (?:(?!\<[0-9])(?:(?:2[0123]|[01]?[0-9])):(?:(?:[0-5][0-9]))(?::(?:(?:(?:[0-5]?[0-9]|60)(?:[:.,][0-9]+)?)))(?![0-9])))
|(?\(?:(?\>\d\d){1,2})-(?:(?:0?[1-9]|1[0-2]))-(?:(?:(?:0[1-9])|(?:[12][0-9])|(?:3[01])|[1-9]))T
:?(?:(?:[0-5][0-9]))(?::?(?:(?:(?:[0-5]?[0-9]|60)(?:[:.,][0-9]+)?)))?(?:(?:Z|+-(?::?(?:(?:[0-5][0-9])))))?))(?:\s\*)(?:-|(?IPORHOST:syslog\_host
(?:(?:(?:(?:((([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:))|(([0-9A-Fa-f]{1,4}:){6}(:[0-9A-Fa-f]{1,4}|((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d))
{3})|:))|(([0-9A-Fa-f]{1,4}:){5}(((:[0-9A-Fa-f]{1,4}){1,2})|:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){4}
(((:[0-9A-Fa-f]{1,4}){1,3})|((:[0-9A-Fa-f]{1,4})?:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){3}
(((:[0-9A-Fa-f]{1,4}){1,4})|((:[0-9A-Fa-f]{1,4}){0,2}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){2}
(((:[0-9A-Fa-f]{1,4}){1,5})|((:[0-9A-Fa-f]{1,4}){0,3}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){1}
(((:[0-9A-Fa-f]{1,4}){1,6})|((:[0-9A-Fa-f]{1,4}){0,4}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(:(((:[0-9A-Fa-f]{1,4})
{1,7})|((:[0-9A-Fa-f]{1,4}){0,5}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:)))(%.+)?)|(?:(?\