File does not conform to the schema – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 2.3-2.3

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Briefly, this error occurs when the structure of a file you’re trying to import into Elasticsearch doesn’t match the expected schema. This could be due to incorrect field names, data types, or missing required fields. To resolve this issue, you can: 1) Review the file and ensure it matches the schema. 2) Update the schema to match the file structure. 3) Use a data transformation tool to modify the file structure before importing. Always ensure that the data you’re importing is compatible with your Elasticsearch schema to avoid such errors.

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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.

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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