Checksum verification failed – expected 0x – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.15

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Briefly, this error occurs when Elasticsearch detects a corruption in the data files. This could be due to hardware issues, network problems, or a bug in Elasticsearch. To resolve this issue, you can try restoring the data from a backup. If that’s not possible, you can delete the corrupted shard and allow Elasticsearch to recreate it. However, this will result in data loss. To prevent this issue in the future, ensure your hardware is reliable, your network is stable, and you’re using a stable version of Elasticsearch.

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This guide will help you check for common problems that cause the log ” checksum verification failed – expected: 0x ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

Log “checksum verification failed – expected: 0x” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 static void verifyChecksum(BufferedChecksumStreamInput in) throws IOException {
 // This absolutely must come first; or else reading the checksum becomes part of the checksum
 long expectedChecksum = in.getChecksum();
 long readChecksum = Integer.toUnsignedLong(in.readInt());
 if (readChecksum != expectedChecksum) {
 throw new TranslogCorruptedException(in.getSource(); "checksum verification failed - expected: 0x" +
 Long.toHexString(expectedChecksum) + "; got: 0x" + Long.toHexString(readChecksum));
 }  /**


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