<p>Replication event checksum verification failed while reading a binary log file.</p>
<p>MySQL Error 1744 ER_BINLOG_READ_EVENT_CHECKSUM_FAILURE occurs when the server cannot validate the checksum of a binlog event, usually due to file corruption or mismatched settings. Regenerate or replace the corrupted log and align binlog_checksum settings to resolve the issue.</p>
Replication event checksum verification failed while
MySQL throws error 1744 when the server cannot verify the checksum attached to a replication event stored in the binary log. The check fails during log reading, so the server halts replication to protect data integrity.
The error is critical in high-availability environments because an undetected corrupted event could replicate bad data or break crash recovery. Immediate diagnosis and remediation keep replicas in sync and maintain transactional consistency.
Most cases trace back to physical corruption of the binary log file, often from disk faults, abrupt power loss, or storage layer inconsistencies. The checksum saved at commit no longer matches the bytes read later.
Mismatched binlog_checksum settings between master and replica can also trigger the error. If the source enables CRC32 while the replica expects NONE or vice versa, MySQL fails validation and reports error 1744.
Start by identifying the exact log file and position shown in the server error log. Copy the file to a safe location, then run mysqlbinlog --verify-binlog-checksum to confirm corruption.
If corruption is confirmed, remove or skip the damaged event so replication can continue. Align binlog_checksum settings on all nodes, restart replication threads, and monitor the relay log positions.
On a primary server, rotating the binary log with FLUSH BINARY LOGS generates a fresh file, bypassing the broken one. On a replica, issuing SET GLOBAL sql_slave_skip_counter = 1 before START SLAVE skips one event and resumes replication if data loss is acceptable.
When data consistency is paramount, rebuild the replica from a recent backup or snapshot instead of skipping events. This guarantees that no corrupted data enters the replica.
Enable CRC32 checksums on every MySQL instance and keep binlog_checksum settings identical across the cluster. Regularly run mysqlbinlog --verify-binlog-checksum during backups to detect corruption early.
Deploy redundant, battery-backed storage, schedule periodic hardware S.M.A.R.T. checks, and replicate over reliable networks. Galaxy's version-controlled query library lowers the risk of accidental misconfiguration by centralizing settings in shared configuration snippets.
Error 1593 (ER_SLAVE_FATAL_ERROR_RUNNING_QUERY) surfaces when a replica cannot execute a faulty statement after skipping a checksum failure. Aligning schema and replaying failed statements usually clears it.
Error 1236 (ER_MASTER_FATAL_ERROR_READING_BINLOG) appears when a replica requests a nonexistent log or one with a truncated header. Re-pointing the replica to the correct master log file and position resolves the issue.
Disk errors, sudden power loss, or incomplete writes damage the binlog and invalidate its checksum.
The master may write CRC32 checksums while the replica expects NONE, causing verification failure during replication.
Faulty RAID controllers or virtualization storage bugs alter log bytes in transit, breaking checksum integrity.
Replica cannot read a binlog event because the file is missing or truncated.
Replica stops after failing to execute a statement from the relay log.
Checksum of a relay log event is invalid or the relay log is corrupt.
Yes. Skipping bypasses the corrupted statement, so ensure the event is safe to ignore or rebuild the replica.
Disabling checksums hides corruption and is not recommended. Fix the root cause instead.
No. Upgrades do not repair past corruption. Rotate logs or rebuild replicas to clear the error.
Galaxy surfaces replication health metrics in the editor and stores shared config templates so teams keep checksum settings consistent.
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