Corrupted file detected checksum mismatch – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-2.9

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 detects a corrupted file due to a checksum mismatch. This usually happens when the data in the file has been altered or damaged. To resolve this issue, you can try the following methods: 1) Restore the corrupted file from a backup if available. 2) Delete and rebuild the index if the corrupted file is part of an index. 3) If the corrupted file is a transaction log, you can try to delete it, OpenSearch will recreate it. Always ensure to have a backup before performing these operations.

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 ” {} Corrupted file detected {} checksum mismatch ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: indices, replication.

Log Context

Log “{} Corrupted file detected {} checksum mismatch” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

            Exception localException = null;
            for (StoreFileMetadata md : mds) {
                logger.debug("checking integrity for file {} after remove corruption exception"; md);
                if (store.checkIntegrityNoException(md) == false) { // we are corrupted on the primary -- fail!
                    logger.warn("{} Corrupted file detected {} checksum mismatch"; shard.shardId(); md);
                    if (localException == null) {
                        localException = corruptIndexException;
                    shard.failShard("error sending files"; corruptIndexException);


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