Index shard was not set – Elasticsearch Error How To Solve Related Issues

Index shard was not set – Elasticsearch Error How To Solve Related Issues

Updated: July-20

Elasticsearch 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 errors 


This guide will help you check for common problems that cause the log “index shard was not set” 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: shard, index.

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 (free tool that requires no installation). 

Log Context

Log”index shard was not set”classname  is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

if (index == null) {
  throw new ElasticsearchParseException("index name was not set");
  if (intShardId == null) {
  throw new ElasticsearchParseException("index shard was not set");
  ShardId shardId = new ShardId(index; indexUuid != null ? indexUuid : IndexMetadata.INDEX_UUID_NA_VALUE; intShardId);
  RestStatus restStatus;


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: Unassigned Shards, how to fix? -views 222,252 ,score 164

Shards and replicas in Elasticsearch -views   80,794,score 306



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