MySQL throws Error 1182 when it encounters an operating-system problem while executing FLUSH LOGS, blocking log rotation and checkpointing.
MySQL Error 1182: ER_ERROR_DURING_FLUSH_LOGS signals an operating-system or file-system problem during a FLUSH LOGS operation. Fix it by freeing disk space, correcting permissions, or resolving I/O errors, then rerun FLUSH LOGS.
ER_ERROR_DURING_FLUSH_LOGS
Error 1182 appears when MySQL executes the FLUSH LOGS command or performs an implicit log flush and encounters an I/O-related failure. The server returns SQLSTATE HY000 and stops the flush, leaving binary, relay, or general logs unrotated.
This error usually indicates a disk-level or permission problem rather than a SQL syntax issue. Ignoring it risks data loss because log records may never reach durable storage.
Address it immediately, especially on production servers.
The server cannot create, write, or rename log files because the underlying file system rejects the operation.
Conditions include full partitions, missing directories, or OS-level quota limits.
Incorrect file or directory ownership frequently blocks mysqld from renaming log files during rotation, triggering Error 1182.
Hardware faults, such as a failing SSD or a read-only mount, stop write operations mid-flush and surface as Error 1182.
Start by checking the MySQL error log to capture the exact OS error code printed after “Got error X during FLUSH_LOGS.” That code pinpoints the root cause.
Free disk space or extend the partition if the OS code indicates ENOSPC (No space left on device).
Then issue FLUSH LOGS again.
If the code is EACCES or EPERM, verify directory and file permissions. Ensure the MySQL user owns datadir and log paths, correct with chown, and restart the flush.
During binary log rotation on replicas, Error 1182 can halt replication. After fixing the disk or permission issue, execute SHOW SLAVE STATUS to confirm the replica resumes.
On systems using logrotate outside MySQL, simultaneous rotations may clash.
Disable external rotation and rely on FLUSH LOGS or --log-bin-index rotation.
Monitor disk usage with Prometheus or CloudWatch and set alerts at 80 percent capacity so operators act before partitions fill.
Run mysqld under a dedicated system account and lock down proper ownership at deployment time using configuration management tools.
Place logs on a separate volume to isolate growth from the main data directory, reducing the chance of full disks causing FLUSH LOGS failures.
Error 3 (HY000): “Error writing file” arises during general writes, not just FLUSH LOGS, but shares the same disk or permission roots.
Error 1017 (HY000): “Can’t find file” triggers when mysqld cannot locate a log or table file, often following a failed rotation similar to Error 1182.
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Yes. If logs cannot be flushed, recent transactions may not be fully persisted, risking data loss on crash.
Ignoring it is unsafe even in development because it hides storage problems that will surface in production.
Only if the underlying cause changes server state, such as remounting a read-only file system. Otherwise a simple FLUSH LOGS retry suffices.
Galaxy’s editor surfaces MySQL error logs inline and can run automated health checks, helping users spot disk issues before Error 1182 appears.
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