Failed to deserialize response from remoteAddress – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.3-8.9

Briefly, this error occurs when Elasticsearch is unable to convert the response received from a remote address back into a usable data format. This could be due to a mismatch in versions between nodes, network issues, or corrupted data. To resolve this, ensure all nodes are running the same Elasticsearch version. Check your network for any issues that might be causing data corruption. If the problem persists, consider reindexing your data, as it might be corrupted.

This guide will help you check for common problems that cause the log ” Failed to deserialize response from [” + remoteAddress + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: response.

Log Context

Log “Failed to deserialize response from [” + remoteAddress + “]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

        } catch (Exception e) {
            final TransportException serializationException = new TransportSerializationException(
                "Failed to deserialize response from handler [" + handler + "]";
            logger.warn(() -> "Failed to deserialize response from [" + remoteAddress + "]"; serializationException);
            assert ignoreDeserializationErrors : e;
            doHandleException(handler; serializationException);
        try {


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