Log Index blob is not valid x-content bytes – How To Solve Related Issues

Log Index blob is not valid x-content bytes – How To Solve Related Issues

Opster Team

Jan-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up  which can resolve issues causing many log errors (free and no installation required)


This guide will help you check for common problems that cause the log “Index blob is not valid x-content bytes” to appear. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: blobstore, index, repositories, repository-azure.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to discover the cause of many errors and provides suitable actionable recommendations. 

Log Context

Log”[{}] index blob is not valid x-content [{} bytes]” classname is BlobStoreRepository.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                 // EMPTY is safe here because RepositoryData#fromXContent calls namedObject
                try (XContentParser parser = XContentHelper.createParser(NamedXContentRegistry.EMPTY;
                    LoggingDeprecationHandler.INSTANCE; out.bytes(); XContentType.JSON)) {
                    repositoryData = RepositoryData.snapshotsFromXContent(parser; indexGen);
                } catch (NotXContentException e) {
                    logger.warn("[{}] index blob is not valid x-content [{} bytes]"; snapshotsIndexBlobName; out.bytes().length());
                    throw e;

            // now load the incompatible snapshot ids; if they exist


Related issues to this log

We have gathered selected Q&A from the community and issues from Github, that can help fix related issues please review the following for further information :

1 AJAX Call with Elasticsearch Search -views 16.97 K ,score 14

Github Issue Number 37005  


About Opster

Opster line of products and support services detects, prevents, optimizes and automates everything needed to manage mission-critical Elasticsearch.

Find Configuration Errors

Analyze Now