How To Solve Issues Related to Log – Failed to validate incoming join request from node

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Updated: Dec-19

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Troubleshooting background

To troubleshoot Elasticsearch log “Failed to validate incoming join request from node” 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 Cluster Cant Join New  

2Failed To Join Cluster  

Error When Adding Node Into Cluster


Log Context

Log ”Failed to validate incoming join request from node [{}]” classname is ZenDiscovery.java
We have extracted the following from Elasticsearch source code to get an in-depth context :

             // validate the join request; will throw a failure if it fails; which will get back to the
            // node calling the join request
            try {
                membership.sendValidateJoinRequestBlocking(node; state; joinTimeout);
            } catch (Exception e) {
                logger.warn(() -> new ParameterizedMessage("failed to validate incoming join request from node [{}]"; node);
                    e);
                callback.onFailure(new IllegalStateException("failure when sending a validation request to node"; e));
                return;
            }
            nodeJoinController.handleJoinRequest(node; callback);



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