How To Solve Issues Related to Log – Failed to send join request to master ; reason

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Related Issues – selected resources on related issues  
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Troubleshooting background

To troubleshoot Elasticsearch log “Failed to send join request to master ; reason” it’s important to know common problems related to Elasticsearch concepts: discovery, join, master, request. See below-detailed explanations 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 :

failed to send join request to master elastic search 5.4 cluster

Number of Views : 4.97 K  Score on Stackoverflow : 5

Failed to send join request to master ElasticSearch on AWS EC2 owned cluster

Number of Views : 0.47 K  Score on Stackoverflow : 2

Log Context

Log ”Failed to send join request to master ; reason” classname is
We have extracted the following from Elasticsearch source code to get an in-depth context :

                } else {
                    if (logger.isTraceEnabled()) {
                        logger.trace(() -> new ParameterizedMessage("failed to send join request to master [{}]"; masterNode); e);
                    } else {
              "failed to send join request to master [{}]; reason [{}]"; masterNode;
                    return false;

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