Snapshot differs from actual index for file meta – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.9

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Briefly, this error occurs when the metadata of the snapshot and the actual index in Elasticsearch do not match. This could be due to a corruption or a failed update. To resolve this issue, you can try the following: 1) Restore the index from a previous snapshot that doesn’t have this discrepancy. 2) Delete and recreate the index if the data is not critical. 3) If the data is critical, you may need to manually correct the metadata, which should be done with caution as it can lead to data loss.

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This guide will help you check for common problems that cause the log ” Snapshot differs from actual index for file: {} meta: {} ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: indices, index, recovery, snapshot.

Log Context

Log “Snapshot differs from actual index for file: {} meta: {}” classname is RecoverySourceHandler.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                throw ex;
            }
            for (String name : snapshot.getFileNames()) {
                final StoreFileMetadata md = recoverySourceMetadata.get(name);
                if (md == null) {
                    logger.info("Snapshot differs from actual index for file: {} meta: {}"; name; recoverySourceMetadata.fileMetadataMap());
                    throw new CorruptIndexException(
                        "Snapshot differs from actual index - maybe index was removed metadata has "
                            + recoverySourceMetadata.fileMetadataMap().size()
                            + " files";
                        name

 

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