# Fingerprint filter and concatenate\_sources

**URL:** <https://discuss.elastic.co/t/fingerprint-filter-and-concatenate-sources/43498>\
**Category:** Logstash\
**Created:** [March 4, 2016, 10:53am UTC](https://discuss.elastic.co/t/fingerprint-filter-and-concatenate-sources/43498 "2016-03-04T10:53:21Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![peppetrick](https://avatars.discourse-cdn.com/v4/letter/p/3d9bf3/32.png) [@peppetrick](https://discuss.elastic.co/u/peppetrick)\
**Post date:** [March 4, 2016, 10:53am UTC](https://discuss.elastic.co/t/fingerprint-filter-and-concatenate-sources/43498/1 "2016-03-04T10:53:21Z")

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Hi

I have a doubt about documentation for fingerprint filter.

regarding **concatenate\_sources** Documentation states

"When set to true, we concatenate the values of all fields into 1 string like the old checksum filter"

But all field refers to field in **source** array of fingerprint filter, or field of all document/event?

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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:** [March 4, 2016, 12:11pm UTC](https://discuss.elastic.co/t/fingerprint-filter-and-concatenate-sources/43498/2 "2016-03-04T12:11:37Z")

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It's all fields in the `source` field that'll get concatenated.

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<div class="post-metadata">

**Author:** ![peppetrick](https://avatars.discourse-cdn.com/v4/letter/p/3d9bf3/32.png) [@peppetrick](https://discuss.elastic.co/u/peppetrick)\
**Post date:** [March 4, 2016, 1:01pm UTC](https://discuss.elastic.co/t/fingerprint-filter-and-concatenate-sources/43498/3 "2016-03-04T13:01:55Z")

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Is there a way to include all fileds of a document in the fingerprint? We have only dynamic fields...

Thanks

Giuseppe

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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:** [March 4, 2016, 2:00pm UTC](https://discuss.elastic.co/t/fingerprint-filter-and-concatenate-sources/43498/4 "2016-03-04T14:00:20Z")

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There doesn't appear to be a way to do that, I'm afraid.

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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:** [July 6, 2017, 5:08am UTC](https://discuss.elastic.co/t/fingerprint-filter-and-concatenate-sources/43498/5 "2017-07-06T05:08:20Z")

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