# Multiple logstash nodes gathering log by http\_poller prevent duplicates **URL:** \ **Category:** Logstash\ **Created:** [April 30, 2020, 1:56pm UTC](https://discuss.elastic.co/t/multiple-logstash-nodes-gathering-log-by-http-poller-prevent-duplicates/230568 "2020-04-30T13:56:33Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![mfielt](https://avatars.discourse-cdn.com/v4/letter/m/71c47a/32.png) [@mfielt](https://discuss.elastic.co/u/mfielt)\ **Post date:** [April 30, 2020, 1:56pm UTC](https://discuss.elastic.co/t/multiple-logstash-nodes-gathering-log-by-http-poller-prevent-duplicates/230568/1 "2020-04-30T13:56:33Z")
Hi, `We are using the ELK stack for a couple of years now and are on version 7.6.2` `For the first time we are using the http_poller plugin. Each logstash has the same configuration and therefor the nodes are getting the logs at the same time and duplicate events are created in Elastic.` `Is there a neat way to prevent this?` `Regards, Mark.` ---
**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\ **Post date:** [April 30, 2020, 2:26pm UTC](https://discuss.elastic.co/t/multiple-logstash-nodes-gathering-log-by-http-poller-prevent-duplicates/230568/2 "2020-04-30T14:26:37Z")
Use a fingerprint filter to set the document\_id option on the elasticsearch output. You still do all of the work twice, but the documents will get overwritten. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [May 28, 2020, 2:26pm UTC](https://discuss.elastic.co/t/multiple-logstash-nodes-gathering-log-by-http-poller-prevent-duplicates/230568/3 "2020-05-28T14:26:42Z")
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