Failed to write shard state – How to solve related issues

Opster Team

Feb-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Failed to write shard state ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index and shard.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “failed to write shard state” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                 final ShardStateMetaData newShardStateMetadata = new ShardStateMetaData(newRouting.version(); newRouting.primary();
                logger.trace("{} writing shard state; reason [{}]"; shardId; writeReason);
                ShardStateMetaData.FORMAT.write(newShardStateMetadata; newShardStateMetadata.version; shardPath().getShardStatePath());
            } catch (IOException e) { // this is how we used to handle it.... :(
                logger.warn("failed to write shard state"; e);
                // we failed to write the shard state; we will try and write
                // it next time...


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