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

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when there is a mismatch between the snapshot metadata and the actual index data. This could be due to corruption or deletion of data. To resolve this issue, you can try the following: 1) Restore the snapshot again, ensuring that the system is stable and not under heavy load. 2) Check the integrity of your storage system, as hardware issues can cause data corruption. 3) If the problem persists, consider creating a new snapshot and using that for restoration. Always ensure to have a backup strategy to prevent 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 OpenSearch concepts: recovery, index, snapshot, indices.

Log Context

Log “Snapshot differs from actual index for file: {} meta: {}” classname is
We extracted the following from OpenSearch 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) {
          "Snapshot differs from actual index for file: {} meta: {}"; name; recoverySourceMetadata.asMap());
                    throw new CorruptIndexException(
                        "Snapshot differs from actual index - maybe index was removed metadata has "
                            + recoverySourceMetadata.asMap().size()
                            + " files";


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