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

Opster Team

Aug-23, Version: 6.8-7.17

Before you dig into reading this guide, have you tried asking OpsGPT what this log means? You’ll receive a customized analysis of your log.

Try OpsGPT now for step-by-step guidance and tailored insights into your Elasticsearch operation.

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.

For a complete solution to your to your search operation, try for free AutoOps for Elasticsearch & OpenSearch . With AutoOps and Opster’s proactive support, you don’t have to worry about your search operation – we take charge of it. Get improved performance & stability with less hardware.

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
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) {

                        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);


How helpful was this guide?

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?