# Deploying filebeat error
**URL:** https://forum.opensearch.org/t/deploying-filebeat-error/8523
**Category:** Open Source Elasticsearch and Kibana
**Tags:** all-clients, releases
**Created:** [February 4, 2022, 2:35pm UTC](https://forum.opensearch.org/t/deploying-filebeat-error/8523 "2022-02-04T14:35:17Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@skopen](https://forum.opensearch.org/u/skopen)
#### Post date: [February 4, 2022, 2:35pm UTC](https://forum.opensearch.org/t/deploying-filebeat-error/8523/1 "2022-02-04T14:35:17Z")
Hi Team,
when we are trying to deploying filebeat in one of the server ,getting below error . may someone help me on this
ERROR [publisher\_pipeline\_output] Failed to connect to backoff(elasticsearch([https://example.com](https://example.com))):
Connection marked as failed because the onConnect callback failed: could not connect to a compatible version of
Elasticsearch: 400 Bad Request: {“error”:{“root\_cause”:[{“type”:“invalid\_index\_name\_exception”,“reason”:
“Invalid index name [_license], must not start with '_'.”,“index”:“\_license”,“index\_uuid”:“_na_”}],“type”:“invalid\_index\_name\_exception”,
“reason”:“Invalid index name [_license], must not start with '_'.”,“index”:“\_license”,“index\_uuid”:“_na_”},“status”:400}
INFO [publisher\_pipeline\_output] Attempting to reconnect to backoff(elasticsearch([https://example.com](https://example.com)) with 22 reconnect attempt(s)
Note: We install opensearch version 1.2.3 and opensearch dashboard version 1.2.0 through helm. able to open the dashboard. when we are trying using filebeat getting above error.
i want to know what is the elasticsearch version and kibana version used this opensearch version.?
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### Author:  [@kris](https://forum.opensearch.org/u/kris)
#### Post date: [February 7, 2023, 12:02am UTC](https://forum.opensearch.org/t/deploying-filebeat-error/8523/2 "2023-02-07T00:02:57Z")