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

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Updated: Dec-19

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Log Context
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Troubleshooting background

To troubleshoot Elasticsearch log “Failed to send join request to master ; reason” it’s important to understand common problems related to Elasticsearch concepts: discovery-azure-classic. 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 5.0.0. cluster node not joining 8 2.68 K 


Adding New Node To An Existing Clus

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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