File does not conform to the schema – How to solve related issues

Opster Team

Feb-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” File does not conform to the schema ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: blobstore, discovery-file, index, repository-azure and shard.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “file [{}] does not conform to the ‘{}’ schema” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                     long currentGen = Long.parseLong(name.substring(DATA_BLOB_PREFIX.length()); Character.MAX_RADIX);
                    if (currentGen > generation) {
                        generation = currentGen;
                } catch (NumberFormatException e) {
                    logger.warn("file [{}] does not conform to the '{}' schema"; name; DATA_BLOB_PREFIX);
            return generation;


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