Maximum number of retries reached

We got 3 different environments running Elastic Search - Development, Test and Production. But recently we started to get the error "Maximum number of retries reached" when creating an Index from a C# program, but only in the test environment. It's a cluster with 2 nodes.

This is the exact exception thrown: "Elasticsearch.Net.ElasticsearchClientException: Maximum number of retries reached. ---> System.Net.WebException: The remote server returned an error: (400) Bad Request."

I hope that someone in this group can give me a hint, what to search for?

Problem is solved. It was an issue with the disk space on both servers. Looks like there is a 85% treshold setting in elastic-search configuration that caused the problem.

I could change the treshold value, but cleaning up the disk was an immediate fix

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