How To Solve Issues Related to Log – Message not fully read (response) for handler . error . resetting

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Updated: Feb-20

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Troubleshooting background

To troubleshoot Elasticsearch log “Message not fully read (response) for handler . error . resetting” it’s important to understand common problems related to Elasticsearch concepts: handler, netty. See detailed explanations below complete with common problems, examples and useful tips.


To help troubleshoot related issues we have gathered selected Q&A from the community and issues from Github , please review the following for further information :

1 Es 5 1 1 Cluster Loses A Node Rando  

2Message Not Fully Read Response For  


Log Context

Log ”Message not fully read (response) for [{}] handler {}; error [{}]; resetting” classname is MessageChannelHandler.java
We have extracted the following from Elasticsearch source code to get an in-depth context :

<pre class="wp-block-syntaxhighlighter-code">                 // if its null; skip those bytes
                buffer.readerIndex(markedReaderIndex + size);
            }
            if (buffer.readerIndex() != expectedIndexReader) {
                if (buffer.readerIndex() < expectedIndexReader) {
                    logger.warn("Message not fully read (response) for [{}] handler {}; error [{}]; resetting"; requestId; handler; TransportStatus.isError(status));
                } else {
                    logger.warn("Message read past expected size (response) for [{}] handler {}; error [{}]; resetting"; requestId; handler; TransportStatus.isError(status));
                }
                buffer.readerIndex(expectedIndexReader);
            }




</pre>


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