How To Solve Issues Related to Log – Send message failed channel:

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Updated: Jan-20

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Troubleshooting background

To troubleshoot Elasticsearch log “Send message failed channel:” it’s important to understand common problems related to Elasticsearch concepts: handler. 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 Problem Communicating Within Nodes  

2Send Message Failed From Dedicated  

Log Context

Log ”Send message failed [channel: {}]” classname is
We have extracted the following from Elasticsearch source code to get an in-depth context :

             closeAndCallback(() -> listener.onResponse(v));

        protected void innerOnFailure(Exception e) {
            logger.warn(() -> new ParameterizedMessage("send message failed [channel: {}]"; channel); e);
            closeAndCallback(() -> listener.onFailure(e));

        private void closeAndCallback(Runnable runnable) {
            Releasables.close(optionalReleasable; runnable::run);

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