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After migrating to AWS OpenSearch from Elasticsearch we get the following error when calling OpenSearch via the Elasticsearch-Rest-High-Level-Client:

elasticsearch.ElasticsearchException: Invalid or missing tagline [The OpenSearch Project: https://opensearch.org/]
Nexonus
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2 Answers2

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As it turns out the version of the Elasticsearch-Rest-High-Level-Client was too new. We used the client version 7.15.0 with OpenSearch 1.0. We downgraded the client to 7.10.2 and it worked again.

Also using the OpenSearch-Rest-High-Level-Client in version 1.0 worked, too.

Nexonus
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I was facing same issue. Downgrading version of Elasticsearch-Rest-High-Level-Client to 7.10.2 worked for me.

Anju
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