Failed to create security index – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch is unable to create a security index, which is essential for storing security-related information. This could be due to insufficient permissions, lack of disk space, or a misconfigured Elasticsearch cluster. To resolve this issue, you can check and adjust the user permissions, ensure there is enough disk space, or review and correct the cluster configuration. Additionally, you can also try restarting the Elasticsearch service.

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

Log Context

Log “Failed to create security index” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 public void onResponse(CreateIndexResponse createIndexResponse) {
 if (createIndexResponse.isAcknowledged()) {;
 } else {
 consumer.accept(new ElasticsearchException("Failed to create security index"));
 }  @Override
 public void onFailure(Exception e) {


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