Reason – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-6.8

Briefly, this error occurs when Elasticsearch encounters an issue during a process, but the error message is not specific enough to identify the exact problem. It could be due to a variety of reasons such as incorrect configurations, insufficient resources, or network issues. To resolve this, you can check the Elasticsearch logs for more detailed error messages. Ensure that your configurations are correct and that Elasticsearch has enough resources (CPU, memory, disk space). Also, check your network connectivity to ensure that Elasticsearch can communicate with other nodes and services.

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

Log Context

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

        // new cluster state; notify all listeners
        final DiscoveryNodes.Delta nodesDelta = clusterChangedEvent.nodesDelta();
        if (nodesDelta.hasChanges() && logger.isInfoEnabled()) {
            String summary = nodesDelta.shortSummary();
            if (summary.length() > 0) {
      "{}; reason: {}"; summary; task.source);



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