# Grok pattern for \[2017-08-19T12:47:43,822\]\[INFO\]

**URL:** <https://discuss.elastic.co/t/grok-pattern-for-2017-08-19t12-47-43-822-info/97656>\
**Category:** Logstash\
**Created:** [August 19, 2017, 9:54am UTC](https://discuss.elastic.co/t/grok-pattern-for-2017-08-19t12-47-43-822-info/97656 "2017-08-19T09:54:36Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![arunvijayam](https://avatars.discourse-cdn.com/v4/letter/a/ba9def/32.png) [@arunvijayam](https://discuss.elastic.co/u/arunvijayam)\
**Post date:** [August 19, 2017, 9:54am UTC](https://discuss.elastic.co/t/grok-pattern-for-2017-08-19t12-47-43-822-info/97656/1 "2017-08-19T09:54:36Z")

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Hi All,

Can any one explain the grok pattern for the below lines,  
[2017-08-19T12:47:43,822][INFO][logstash.agent] Successfully started Logstash API endpoint {:port=\>9600}  
[2017-08-19T12:49:47,213][WARN][logstash.agent] stopping pipeline {:id=\>"main"}

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [August 19, 2017, 9:12pm UTC](https://discuss.elastic.co/t/grok-pattern-for-2017-08-19t12-47-43-822-info/97656/2 "2017-08-19T21:12:52Z")

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What have you tried so far?

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**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\
**Post date:** [August 20, 2017, 10:01am UTC](https://discuss.elastic.co/t/grok-pattern-for-2017-08-19t12-47-43-822-info/97656/3 "2017-08-20T10:01:21Z")

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If you want to parse the Logstash log with Logstash you should use the `--log.format` option to have it produce JSON-formatted files.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [September 17, 2017, 10:01am UTC](https://discuss.elastic.co/t/grok-pattern-for-2017-08-19t12-47-43-822-info/97656/4 "2017-09-17T10:01:23Z")

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