Failed to create index index – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.8-7.17

Briefly, this error occurs when Elasticsearch is unable to create a new index due to various reasons such as insufficient disk space, incorrect index settings, or a conflict with an existing index name. To resolve this issue, you can check if there’s enough disk space and increase it if necessary. Also, verify the index settings for any errors and ensure the index name you’re trying to create doesn’t already exist. If it does, use a different name or delete the existing index if it’s no longer needed.

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

Log Context

Log “failed to create ” + index + ” index” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                    .addMapping(SINGLE_MAPPING_NAME; mappings())
                    .execute(ActionListener.wrap(resp -> listener.onResponse(null); exc -> {
                        if (ExceptionsHelper.unwrapCause(exc) instanceof ResourceAlreadyExistsException) {
                        } else {
                            logger.error("failed to create " + index + " index"; exc);
            } catch (Exception exc) {
                logger.error("failed to create " + index + " index"; exc);


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