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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.
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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 SegmentFileTransferHandler.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :
Exception localException = null;
for (StoreFileMetadata md : mds) {
cancellableThreads.checkForCancel();
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);
}
