Check index failed – How to solve this OpenSearch exception

Opster Team

Aug-23, Version: 1-2.9

Before you dig into reading this guide, have you tried asking OpsGPT what this log means? You’ll receive a customized analysis of your log.

Try OpsGPT now for step-by-step guidance and tailored insights into your OpenSearch operation.

Briefly, this error occurs when OpenSearch is unable to access or read the specified index. This could be due to various reasons such as the index not existing, insufficient permissions, or network connectivity issues. To resolve this, you can verify if the index exists and if you have the necessary permissions to access it. If the index does exist and you have the right permissions, check your network connectivity. If the issue persists, consider checking the OpenSearch logs for more detailed error information.

For a complete solution to your to your search operation, try for free AutoOps for Elasticsearch & OpenSearch . With AutoOps and Opster’s proactive support, you don’t have to worry about your search operation – we take charge of it. Get improved performance & stability with less hardware.

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

Log Context

Log “check index failed” class name is We extracted the following from OpenSearch source code for those seeking an in-depth context :

 if (Booleans.isTrue(checkIndexOnStartup) || "checksum".equals(checkIndexOnStartup)) {
 try {
 } catch (IOException ex) {
 throw new RecoveryFailedException(recoveryState; "check index failed"; ex);
 }  void checkIndex() throws IOException {


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?

Get expert answers on Elasticsearch/OpenSearch