Failed to test query – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.4-7.13

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Briefly, this error occurs when Elasticsearch is unable to execute a query due to issues like incorrect syntax, invalid field names, or connectivity problems. To resolve this, ensure the query syntax is correct and the fields referenced exist in the index. Also, check the Elasticsearch server’s health and connectivity. If the problem persists, inspect the Elasticsearch logs for more detailed error information.

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This guide will help you check for common problems that cause the log ” Failed to test query ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: query, plugin.

Log Context

Log “Failed to test query” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 }; e -> {
 Throwable unwrapped = ExceptionsHelper.unwrapCause(e);
 RestStatus status = unwrapped instanceof ElasticsearchException
 ? ((ElasticsearchException) unwrapped).status()
 listener.onFailure(new ElasticsearchStatusException("Failed to test query"; status; unwrapped));
 }  @Override
 public Tuple; Map> processSearchResponse(


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