Failed to handle transport disconnect for node – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-7.17

Briefly, this error occurs when Elasticsearch loses connection with a node in the cluster due to network issues, node failure, or high load. To resolve this, you can check the network connectivity between nodes, ensure the node is running and not overloaded, and increase the timeout settings. Also, consider optimizing your queries and indexing operations to reduce the load on the nodes. Regular monitoring and alerting can help detect such issues early and prevent them from escalating.

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

Log Context

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

        public void onNodeDisconnected(DiscoveryNode node; Transport.Connection connection) {
            AbstractRunnable runnable = new AbstractRunnable() {
                public void onFailure(Exception e) {
                    logger.warn("failed to handle transport disconnect for node: {}"; node);

                protected void doRun() {


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