Failed to send rejoin request to – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-7.17

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Briefly, this error occurs when a node in the Elasticsearch cluster fails to rejoin the cluster after a network partition or a temporary disconnection. This could be due to network issues, high load on the cluster, or configuration problems. To resolve this issue, you can try the following: 1) Check and fix any network connectivity issues. 2) Reduce the load on the cluster by optimizing your queries or adding more nodes. 3) Check the cluster settings and ensure that the ‘discovery.zen.minimum_master_nodes’ is set correctly. 4) Restart the node that failed to rejoin.

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This guide will help you check for common problems that cause the log ” failed to send rejoin request to [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: request, discovery.

Log Context

Log “failed to send rejoin request to [{}]” classname is ZenDiscovery.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                    new RejoinClusterRequest(localClusterState.nodes().getLocalNodeId());
                    new EmptyTransportResponseHandler(ThreadPool.Names.SAME) {

                        @Override
                        public void handleException(TransportException exp) {
                            logger.warn(() -> new ParameterizedMessage("failed to send rejoin request to [{}]"; otherMaster); exp);
                        }
                    }
                );
            } catch (Exception e) {
                logger.warn(() -> new ParameterizedMessage("failed to send rejoin request to [{}]"; otherMaster); e);

 

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