General node connection failure – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch is unable to establish a connection with a node in the cluster. This could be due to network issues, incorrect configuration, or the node being down. To resolve this, you can check the network connectivity, ensure the node is running, and verify the configuration settings. If the node is part of a cluster, ensure it’s properly connected and synchronized with the cluster. Also, check the Elasticsearch logs for more detailed error information.

This guide will help you check for common problems that cause the log ” general node connection failure ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: node.

Log Context

Log “general node connection failure” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 CloseableChannel.closeChannels(channels; false);
 } catch (Exception e) {
 CloseableChannel.closeChannels(channels; false);
 listener.onFailure(new ConnectTransportException(node; "general node connection failure"; e));
 }  ChannelsConnectedListener channelsConnectedListener = new ChannelsConnectedListener(


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