Index name was not set – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when an Elasticsearch operation is attempted without specifying the index name. This could be due to a programming error or a misconfiguration. To resolve this issue, ensure that the index name is correctly specified in your Elasticsearch operation. If you’re using a programming language to interact with Elasticsearch, double-check your code to ensure the index name is being correctly passed to the Elasticsearch client. If you’re using a configuration file, ensure the index name is correctly set in the configuration.

This guide will help you check for common problems that cause the log ” index name was not set ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

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

 String reason = (String) args[3];
 Integer intShardId = (Integer) args[4];
 String status = (String) args[5];  if (index == null) {
 throw new ElasticsearchParseException("index name was not set");
 if (intShardId == null) {
 throw new ElasticsearchParseException("index shard was not set");


How helpful was this guide?

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?