Error
Error Code:
1538
MariaDB Error 1538: Scheduled Event Storage Failure
Description
Error 1538 indicates that MariaDB failed to store or update a scheduled event. This typically occurs during the creation, alteration, or execution of a scheduled event, signaling an underlying problem with the storage engine's ability to persist event data.
Error Message
Failed to store event %s. Error code %d from storage engine.
Known Causes
4 known causesInsufficient Disk Space
The storage engine cannot write event data because the disk where MariaDB stores its files is full or critically low on space.
File System Permissions
MariaDB lacks the required read/write permissions for its data directory, preventing the storage engine from persisting event definitions.
Storage Engine Malfunction
The underlying storage engine (e.g., InnoDB) is experiencing internal errors or corruption, preventing it from reliably storing event data.
Operating System Resource Limits
The operating system may be imposing resource limits (e.g., open files, memory) that prevent the MariaDB storage engine from completing write operations.
Solutions
4 solutions available1. Check and Increase Event Scheduler Disk Space easy
Ensure the disk partition hosting the MariaDB data directory has sufficient free space.
1
Identify the MariaDB data directory. This is typically configured in `my.cnf` or `my.ini` under the `datadir` variable.
SHOW VARIABLES LIKE 'datadir';2
Check the available disk space on the partition where the data directory resides.
df -h /path/to/your/datadir3
If disk space is low, free up space by removing unnecessary files, logs, or old backups. If necessary, consider expanding the disk or moving the data directory to a larger partition.
2. Verify Event Scheduler Status and Configuration easy
Ensure the event scheduler is enabled and configured correctly.
1
Check if the event scheduler is enabled. It should be ON.
SHOW VARIABLES LIKE 'event_scheduler';2
If `event_scheduler` is OFF, enable it. This can be done temporarily for the current session or permanently by modifying the MariaDB configuration file.
SET GLOBAL event_scheduler = ON;3
To make the change permanent, edit your MariaDB configuration file (e.g., `/etc/my.cnf` or `/etc/mysql/mariadb.conf.d/50-server.cnf`). Add or uncomment the following line under the `[mysqld]` section:
[mysqld]
event_scheduler = ON4
Restart the MariaDB service after modifying the configuration file for permanent changes.
sudo systemctl restart mariadb3. Inspect MariaDB Error Logs for Underlying Issues medium
Examine MariaDB's error logs for more detailed information about the storage engine failure.
1
Locate the MariaDB error log file. The default location can vary but is often found in the data directory or specified in the `my.cnf` file via the `log_error` variable.
SHOW VARIABLES LIKE 'log_error';2
Tail the error log file to see the most recent entries.
tail -f /path/to/your/mariadb.err3
Look for any messages preceding or accompanying error code 1538 that might indicate disk I/O problems, filesystem corruption, or specific storage engine issues.
4
Based on the log messages, you might need to investigate specific storage engine problems (e.g., InnoDB issues if using InnoDB tables for event storage) or filesystem health.
4. Recreate Event Scheduler Tables (Advanced) advanced
If corruption is suspected in the event scheduler's internal tables, they can be rebuilt.
1
Stop the MariaDB service to prevent any further operations on the event scheduler.
sudo systemctl stop mariadb2
Navigate to the MariaDB system tables directory. This is usually within your `datadir` and might be named `mysql`.
3
Identify and back up the following tables: `events`, `event_ RENAME_LOG`, `event_triggers` (if they exist and are related to the error). Note that these are internal InnoDB tables.
4
Start MariaDB again. This will cause it to recreate the necessary internal tables for the event scheduler if they are missing or corrupted.
sudo systemctl start mariadb5
Verify that the event scheduler is now functioning correctly. You may need to re-create any lost events.