How To Solve Issues Related to Log – Exception caught on transport layer ; closing connection

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Updated: Feb-20

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Log Context
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Troubleshooting background

To troubleshoot Elasticsearch log “Exception caught on transport layer ; closing connection” it’s important to understand common problems related to Elasticsearch concepts: 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 Elasticsearch: exception caught on transport layer 2 9.80 K 

2 Exception Caught On Transport Layer    

Log Context

Log ” exception caught on transport layer [{}]; closing connection” classname is
We have extracted the following from Elasticsearch source code to get an in-depth context :

        } else {
            logger.warn("exception caught on transport layer [{}]; closing connection"; e.getCause(); ctx.getChannel());
            // close the channel; which will cause a node to be disconnected if relevant
            disconnectFromNodeChannel(ctx.getChannel(); e.getCause());

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