Log After allocating; node would have less than the required free bytes threshold ( bytes free); preventing allocation – How To Solve Related Issues



Log After allocating; node would have less than the required free bytes threshold ( bytes free); preventing allocation – How To Solve Related Issues

Opster Team

Feb-20, Version: 1.7-8.0



Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up  which can resolve issues causing many log errors (free and no installation required)

 

This guide will help you check for common problems that cause the log “After allocating; node would have less than the required free bytes threshold ( bytes free); preventing allocation” 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, node, routing, threshold.


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 discover the cause of many errors and provides suitable actionable recommendations. 

Log Context

Log”after allocating; node [{}] would have less than the required {} free bytes threshold ({} bytes free); preventing allocation” classname is DiskThresholdDecider.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

         // Secondly; check that allocating the shard to this node doesn't put it above the high watermark
        final long shardSize = getShardSize(shardRouting; allocation.clusterInfo());
        double freeSpaceAfterShard = freeDiskPercentageAfterShardAssigned(usage; shardSize);
        long freeBytesAfterShard = freeBytes - shardSize;
        if (freeBytesAfterShard 

 

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 Disk Space Issues after Close -views 0.73 K ,score 2

low disk watermark [??%] exceeded on -views   54.99 K,score 55

 

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