How To Solve Issues Related to Log – Updating cluster.routing.allocation.cluster_concurrent_rebalance from . to

How To Solve Issues Related to Log – Updating cluster.routing.allocation.cluster_concurrent_rebalance from . to

Updated: Feb-20

Elasticsearch Version: 1.7-8.0

Background

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To troubleshoot log “Updating cluster.routing.allocation.cluster_concurrent_rebalance from . to” it’s important to understand a few problems related to Elasticsearch concepts allocation, cluster, rebalance, routing. See bellow important tips and explanations on these concepts

Log Context

Log”updating [cluster.routing.allocation.cluster_concurrent_rebalance] from [{}]; to [{}]” classname is ConcurrentRebalanceAllocationDecider.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

     class ApplySettings implements NodeSettingsService.Listener {
        
Override
        public void onRefreshSettings(Settings settings) {
            int clusterConcurrentRebalance = settings.getAsInt(CLUSTER_ROUTING_ALLOCATION_CLUSTER_CONCURRENT_REBALANCE; ConcurrentRebalanceAllocationDecider.this.clusterConcurrentRebalance);
            if (clusterConcurrentRebalance != ConcurrentRebalanceAllocationDecider.this.clusterConcurrentRebalance) {
                logger.info("updating [cluster.routing.allocation.cluster_concurrent_rebalance] from [{}]; to [{}]"; ConcurrentRebalanceAllocationDecider.this.clusterConcurrentRebalance; clusterConcurrentRebalance);
                ConcurrentRebalanceAllocationDecider.this.clusterConcurrentRebalance = clusterConcurrentRebalance;
            }
        }
    }




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 Add non existing cluster settings in elasticsearch

1.02 K 

Github Issue Number 7092  

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