Index directory indexPath must exist and be a directory – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch tries to access an index directory that either doesn’t exist or isn’t a directory. Elasticsearch stores its indices in directories, and if it can’t find or access the specified directory, it throws this error. To resolve this issue, you can either create the directory if it doesn’t exist, or ensure the specified path is a directory and not a file. Also, check the permissions of the directory to ensure Elasticsearch has the necessary read/write access.

This guide will help you check for common problems that cause the log ” index directory [” + indexPath + “]; must exist and be a directory ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: shard, index.

Log Context

Log “index directory [” + indexPath + “]; must exist and be a directory” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 final Path path = getPath(folderOption.value(options)).getParent();
 final Path shardParent = path.getParent();
 final Path shardParentParent = shardParent.getParent();
 final Path indexPath = path.resolve(ShardPath.INDEX_FOLDER_NAME);
 if (Files.exists(indexPath) == false || Files.isDirectory(indexPath) == false) {
 throw new ElasticsearchException("index directory [" + indexPath + "]; must exist and be a directory");
 }  final String shardIdFileName = path.getFileName().toString();
 final String indexUUIDFolderName = shardParent.getFileName().toString();
 if (Files.isDirectory(path)


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