# Logstash\_7.5.2\_ Encountered a retryable error. Will Retry with exponential backoff {:code=\>400, :url=\>"https://host:9200/\_bulk"}

**URL:** <https://discuss.elastic.co/t/logstash-7-5-2-encountered-a-retryable-error-will-retry-with-exponential-backoff-code-400-url-https-host-9200-bulk/276635>\
**Category:** Logstash\
**Created:** [June 22, 2021, 10:18am UTC](https://discuss.elastic.co/t/logstash-7-5-2-encountered-a-retryable-error-will-retry-with-exponential-backoff-code-400-url-https-host-9200-bulk/276635 "2021-06-22T10:18:51Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![anburethy](https://avatars.discourse-cdn.com/v4/letter/a/ee7513/32.png) [@anburethy](https://discuss.elastic.co/u/anburethy)\
**Post date:** [June 22, 2021, 10:18am UTC](https://discuss.elastic.co/t/logstash-7-5-2-encountered-a-retryable-error-will-retry-with-exponential-backoff-code-400-url-https-host-9200-bulk/276635/1 "2021-06-22T10:18:51Z")

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Hi Team,

We use an ELK stack and I actually ran into login issue for which I deleted some existing indexes which are old and the login issue sorted but I ran into another issue. I wasnt able to reindex not the new indexes arent getting created. When I tried to dig into it I came across the below error which keeps popping up 4 times every minute under /var/log/logstash.

Though I found some of the suggestions on this error already, but I wasnt able to sove it.

Appreciate suggestions.

[ERROR][logstash.outputs.elasticsearch][main] Encountered a retryable error. Will Retry with exponential backoff {:code=\>400, :url=\>"[https://host:9200/\_bulk](https://host:9200/_bulk)"}

Please note : I am facing this in only one of the environment and not on others. SO the version of ELK is fine in other Env's which are working.

Regards,  
Anbu.

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**Author:** ![rugenl](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rugenl/32/12887_2.png) [@rugenl](https://discuss.elastic.co/u/rugenl)\
**Post date:** [June 22, 2021, 12:52pm UTC](https://discuss.elastic.co/t/logstash-7-5-2-encountered-a-retryable-error-will-retry-with-exponential-backoff-code-400-url-https-host-9200-bulk/276635/2 "2021-06-22T12:52:50Z")

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The "host" in "[https://host:9200](https://host:9200)" looks like the DNS or IP of your elastic server isn't in the logstash configuration. That should be in the output section of your logstash or pipeline config files.

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**Author:** ![anburethy](https://avatars.discourse-cdn.com/v4/letter/a/ee7513/32.png) [@anburethy](https://discuss.elastic.co/u/anburethy)\
**Post date:** [June 22, 2021, 1:16pm UTC](https://discuss.elastic.co/t/logstash-7-5-2-encountered-a-retryable-error-will-retry-with-exponential-backoff-code-400-url-https-host-9200-bulk/276635/3 "2021-06-22T13:16:25Z")

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Thanks @rugenl , I checked the config of logstash & the host is present. Also the point to note is that this isnt a fresh set up , it was working for quite sometime and suddenly throwing this error. No config or version changes done. All I can see is there is a communication issue between logstash & ElasticSearch services

Regards,  
Anbu.

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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 20, 2021, 1:17pm UTC](https://discuss.elastic.co/t/logstash-7-5-2-encountered-a-retryable-error-will-retry-with-exponential-backoff-code-400-url-https-host-9200-bulk/276635/4 "2021-07-20T13:17:16Z")

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