Cannot reconstruct query for signature verification – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.7-8.2

Briefly, this error occurs when Elasticsearch is unable to rebuild a query for signature verification, often due to a malformed or complex query. This could be caused by incorrect syntax, missing parameters, or unsupported query types. To resolve this issue, you can: 1) Review and correct the query syntax; 2) Ensure all necessary parameters are included; 3) Simplify the query or break it into smaller parts; 4) Check if the query type is supported by your Elasticsearch version.

This guide will help you check for common problems that cause the log ” Cannot reconstruct query for signature verification ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, query.

Log Context

Log “Cannot reconstruct query for signature verification” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 try {
 return relayState == null
 ? "SAMLRequest=" + urlEncode(samlRequest) + "&SigAlg=" + urlEncode(sigAlg)
 : "SAMLRequest=" + urlEncode(samlRequest) + "&RelayState=" + urlEncode(relayState) + "&SigAlg=" + urlEncode(sigAlg);
 } catch (UnsupportedEncodingException e) {
 throw new ElasticsearchSecurityException("Cannot reconstruct query for signature verification"; e);


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