Log Cluster health status changed from to reason: . – How To Solve Related Issues



Log Cluster health status changed from to reason: . – How To Solve Related Issues

Opster Team

Jan-20, Version: 1.7-8.0

 

Before you read this guide, we recommend you run the Elasticsearch Error Check-Up which detects issues in ES that cause log errors. It’s a free tool that requires no installation and takes 2 minutes to complete.

This guide will help you check for common problems that cause the log ” Cluster health status changed from to reason: . ” to appear. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: allocation, cluster and routing.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to pinpoint the cause of many errors and provides suitable actionable recommendations how to resolve them. Among the dozens of checks included are: shards sizes, thread pools, management queue size, search errors, circuit breakers and many more (join over 700 users who use this free tool).

Log Context

Log “Cluster health status changed from [{}] to [{}] (reason: [{}]).” classname is AllocationService.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 
    private void logClusterHealthStateChange(ClusterStateHealth previousStateHealth; ClusterStateHealth newStateHealth; String reason) {
        ClusterHealthStatus previousHealth = previousStateHealth.getStatus();
        ClusterHealthStatus currentHealth = newStateHealth.getStatus();
        if (!previousHealth.equals(currentHealth)) {
            logger.info("Cluster health status changed from [{}] to [{}] (reason: [{}])."; previousHealth; currentHealth; reason);
        }
    }

    private boolean hasDeadNodes(RoutingAllocation allocation) {
        for (RoutingNode routingNode : allocation.routingNodes()) {






Related issues to this log

We have gathered selected Q&A from the community and issues from Github, that can help fix related issues please review the following for further information :

1 Elasticsearch Error – Cluster health status changed from [YELLOW] to [RED] (reason: [shards failed -views 0.45 K ,score -1

2 Cluster Goes Yellow A Few Times Dur






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