Caused by: com.mysql.jdbc.PacketTooBigException: Packet for query is too large (4237058 > 4194304). You can change this value on the server by setting the max_allowed_packet' variable.

mysql> SHOW VARIABLES LIKE ‘max_allowed_packet'

+--------------------+---------+
| Variable_name      | Value   |
+--------------------+---------+
| max_allowed_packet | 4194304 |
+--------------------+---------+
1 row in set (0.00 sec)

mysql> SET GLOBAL max_allowed_packet=512000000;

mysql> SHOW VARIABLES LIKE ‘max_allowed_packet'

jdbc:mysql://[dbhost]:[dbport]?useUnicode=true&rewriteBatchedStatements=true&characterEncoding=utf8&useServerPrepStmts=true&maxAllowedPacket=20000000&useSSL=false