Failed to open find files while reading metadata snapshot – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch is unable to access or locate the necessary files while trying to read a metadata snapshot. This could be due to incorrect file paths, insufficient permissions, or the files being deleted or moved. To resolve this issue, you can verify the file paths and ensure they are correct. Check the permissions of the files and directories to ensure OpenSearch has access. Lastly, confirm that the files have not been deleted or moved from their original location.

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This guide will help you check for common problems that cause the log ” Failed to open / find files while reading metadata snapshot ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: index, snapshot, metadata.

Log Context

Log “Failed to open / find files while reading metadata snapshot” classname is Store.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :

            failIfCorrupted(dir);
            return new MetadataSnapshot((IndexCommit) null; dir; logger);
        } catch (IndexNotFoundException ex) {
            // that's fine - happens all the time no need to log
        } catch (FileNotFoundException | NoSuchFileException ex) {
            logger.info("Failed to open / find files while reading metadata snapshot"; ex);
        } catch (ShardLockObtainFailedException ex) {
            logger.info(() -> new ParameterizedMessage("{}: failed to obtain shard lock"; shardId); ex);
        }
        return MetadataSnapshot.EMPTY;
    }

 

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