Exception while reading metadata file – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 2.5-2.9

Before you dig into reading this guide, have you tried asking OpsGPT what this log means? You’ll receive a customized analysis of your log.

Try OpsGPT now for step-by-step guidance and tailored insights into your OpenSearch operation.

Briefly, this error occurs when OpenSearch encounters an issue while trying to read a metadata file. This could be due to file corruption, incorrect file permissions, or the file being inaccessible. To resolve this issue, you can try the following: 1) Check the file’s permissions and ensure OpenSearch has the necessary access. 2) Verify the file’s location and ensure it’s accessible. 3) Check the file’s integrity to ensure it’s not corrupted. If it is, restore it from a backup. 4) If the error persists, consider recreating the metadata file if possible.

For a complete solution to your to your search operation, try for free AutoOps for Elasticsearch & OpenSearch . With AutoOps and Opster’s proactive support, you don’t have to worry about your search operation – we take charge of it. Get improved performance & stability with less hardware.

This guide will help you check for common problems that cause the log ” Exception while reading metadata file: {} ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: index, metadata.

Log Context

Log “Exception while reading metadata file: {}” classname is TranslogTransferManager.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :

                String filename = blobMetadataList.get(0).name();
                try (InputStream inputStream = transferService.downloadBlob(remoteMetadataTransferPath; filename)) {
                    IndexInput indexInput = new ByteArrayIndexInput("metadata file"; inputStream.readAllBytes());
                } catch (IOException e) {
                    logger.error(() -> new ParameterizedMessage("Exception while reading metadata file: {}"; filename); e);
            }; e -> {
                logger.error(() -> new ParameterizedMessage("Exception while listing metadata files"); e);
                exceptionSetOnce.set((IOException) e);


How helpful was this guide?

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?

Get expert answers on Elasticsearch/OpenSearch