# Lucene logging in ElasticSearch logs

**URL:** <https://discuss.elastic.co/t/lucene-logging-in-elasticsearch-logs/226497>\
**Category:** Elasticsearch\
**Created:** [April 4, 2020, 4:08am UTC](https://discuss.elastic.co/t/lucene-logging-in-elasticsearch-logs/226497 "2020-04-04T04:08:26Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![dextermorgan](https://avatars.discourse-cdn.com/v4/letter/d/65b543/32.png) [@dextermorgan](https://discuss.elastic.co/u/dextermorgan)\
**Post date:** [April 4, 2020, 4:08am UTC](https://discuss.elastic.co/t/lucene-logging-in-elasticsearch-logs/226497/1 "2020-04-04T04:08:27Z")

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I am on Elasticsearch 7.6.1 and to debug some issues, want to enable lucene logging in ES logs. Can anyone help with how can enable that?

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**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [April 4, 2020, 10:31am UTC](https://discuss.elastic.co/t/lucene-logging-in-elasticsearch-logs/226497/2 "2020-04-04T10:31:54Z")

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I think you can use this: [https://www.elastic.co/guide/en/elasticsearch/reference/current/logging.html#configuring-logging-levels](https://www.elastic.co/guide/en/elasticsearch/reference/current/logging.html#configuring-logging-levels)

And activate debug for `org.apache.lucene` packages.

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<div class="post-metadata">

**Author:** ![dextermorgan](https://avatars.discourse-cdn.com/v4/letter/d/65b543/32.png) [@dextermorgan](https://discuss.elastic.co/u/dextermorgan)\
**Post date:** [April 4, 2020, 11:15am UTC](https://discuss.elastic.co/t/lucene-logging-in-elasticsearch-logs/226497/3 "2020-04-04T11:15:06Z")

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Ah yes, I saw that but enabled it like following since Engine class path is appended -

```
curl -X PUT "localhost:9200/_cluster/settings?pretty" -H 'Content-Type: application/json' -d'
{
  "persistent": {
    "logger.org.elasticsearch.index.engine.IW": "trace"
  }
}
'
```

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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:** [May 2, 2020, 11:15am UTC](https://discuss.elastic.co/t/lucene-logging-in-elasticsearch-logs/226497/4 "2020-05-02T11:15:07Z")

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