CannedACL is not valid cannedACL – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when the Access Control List (ACL) provided in the Elasticsearch request is not valid. The ACL, also known as cannedACL, is a predefined set of permissions for an object in Elasticsearch. To resolve this issue, you can check the cannedACL value you’re using and ensure it’s one of the predefined set by Elasticsearch. Also, ensure that the user has the necessary permissions to perform the operation. If the error persists, you may need to debug your code to identify any potential issues with the request.

This guide will help you check for common problems that cause the log ” cannedACL is not valid: [” + cannedACL + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: repository-s3, repositories.

Log Context

Log “cannedACL is not valid: [” + cannedACL + “]” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 if (cur.toString().equalsIgnoreCase(cannedACL)) {
 return cur;
 }  throw new BlobStoreException("cannedACL is not valid: [" + cannedACL + "]");
 }  ThreadPool getThreadPool() {
 return threadPool;


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