Message read past expected size request for requestId= action readerIndex vs expected resetting – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 1.7-1.7

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Briefly, this error occurs when Elasticsearch attempts to read a message that exceeds the expected size. This could be due to a large query or document size, or a network issue causing data corruption. To resolve this, you can try reducing the size of your queries or documents, increasing the http.max_content_length setting, or troubleshooting your network to prevent data corruption. Also, ensure that all nodes in your cluster are running the same version of Elasticsearch, as version mismatches can cause this error.

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This guide will help you check for common problems that cause the log ” Message read past expected size (request) for requestId=[{}]; action [{}]; readerIndex [{}] vs expected [{}]; resetting ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: handler, index, netty and request.

Log Context

Log “Message read past expected size (request) for requestId=[{}]; action [{}]; readerIndex [{}] vs expected [{}]; resetting” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

             if (buffer.readerIndex() != expectedIndexReader) {
                if (buffer.readerIndex() 


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