# Problem with my grok-need assistance

**URL:** <https://discuss.elastic.co/t/problem-with-my-grok-need-assistance/150163>\
**Category:** Logstash\
**Created:** [September 27, 2018, 9:54am UTC](https://discuss.elastic.co/t/problem-with-my-grok-need-assistance/150163 "2018-09-27T09:54:19Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Nithani25](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/nithani25/32/33457_2.png) [@Nithani25](https://discuss.elastic.co/u/Nithani25)\
**Post date:** [September 27, 2018, 9:54am UTC](https://discuss.elastic.co/t/problem-with-my-grok-need-assistance/150163/1 "2018-09-27T09:54:19Z")

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Hi Team,  
I am working on some simillar to weblogic trace logs and it has following inputs in combined .

2018-09-27 02:36:11,474 DEBUG [[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'] SegmentedUrlRewriteFilter getUrlRewriter() getUrlRewriter: Cache fresh, using cached object  
2018-09-27 02:36:11,502 WARN [pool-5-thread-413] ProductUtils getConfigNodeByName() No additional config found for: gw-ca

and my grok looks some think below.

%{TIMESTAMP\_ISO8601:occuredtimestamp}\s%{DATA:trace}\s%{GREEDYDATA:threadinfo}]\s%{DATA:loggerclass}\s%{DATA:Method}\s%{GREEDYDATA:Logmessage}

but facing grok parse failure in my codec output.

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<div class="post-metadata">

**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:** [September 27, 2018, 10:20am UTC](https://discuss.elastic.co/t/problem-with-my-grok-need-assistance/150163/2 "2018-09-27T10:20:09Z")

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Don't use more than one DATA or GREEDYDATA in a single grok expression. Use more exact patterns and build your expression step by step.

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<div class="post-metadata">

**Author:** ![Nithani25](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/nithani25/32/33457_2.png) [@Nithani25](https://discuss.elastic.co/u/Nithani25)\
**Post date:** [September 27, 2018, 10:40am UTC](https://discuss.elastic.co/t/problem-with-my-grok-need-assistance/150163/3 "2018-09-27T10:40:48Z")

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Agreed, can i find help to grok the "threadinfo" field in particular, since it has two different values.

[[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)']

[pool-5-thread-413]

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<div class="post-metadata">

**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:** [September 27, 2018, 11:12am UTC](https://discuss.elastic.co/t/problem-with-my-grok-need-assistance/150163/4 "2018-09-27T11:12:11Z")

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Untested:

```
\[(?<threadinfo>(\[[^\]]+\])?[^\]]+)\]
```

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [October 25, 2018, 11:12am UTC](https://discuss.elastic.co/t/problem-with-my-grok-need-assistance/150163/5 "2018-10-25T11:12:14Z")

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