max_allowed_packetに問題がある可能性があります
1.jpgは小さな画像で、2.jpgは大きな画像です
mysql> DESCRIBE blob_files;
+-------+---------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------+---------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| file | blob | YES | | NULL | |
+-------+---------+------+-----+---------+----------------+
2 rows in set (0.01 sec)
mysql> INSERT INTO blob_files(file) VALUE(LOAD_FILE('D:/2.jpg'));
Query OK, 1 row affected, 1 warning (0.00 sec)
mysql> SHOW WARNINGS;
+---------+------+--------------------------------------------------------------
------------------+
| Level | Code | Message
|
+---------+------+--------------------------------------------------------------
------------------+
| Warning | 1301 | Result of load_file() was larger than max_allowed_packet (104
8576) - truncated |
+---------+------+--------------------------------------------------------------
------------------+
1 row in set (0.00 sec)
mysql> INSERT INTO blob_files(file) VALUE(LOAD_FILE('D:/1.jpg'));
Query OK, 1 row affected (0.05 sec)