Failed to reconnect to node – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 2.3-2.3

Briefly, this error occurs when Elasticsearch is unable to re-establish a connection to a node that was previously connected. This could be due to network issues, the node being down, or configuration problems. To resolve this issue, you can check the network connectivity between the nodes, ensure the node is up and running, and verify the cluster settings and node configurations. If the problem persists, consider restarting the Elasticsearch service or the entire node.

This guide will help you check for common problems that cause the log ” failed to reconnect to node {} ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: cluster and node.

Log Context

Log “failed to reconnect to node {}” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                                // log every 6th failure
                                if ((nodeFailureCount % 6) == 0) {
                                    // reset the failure count...
                                    nodeFailureCount = 0;
                                    logger.warn("failed to reconnect to node {}"; e; node);
                                failureCount.put(node; nodeFailureCount);


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?