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[2019-03-30 10:31:51] [HY000][1030] Got error 168 from storage engine
[2019-03-30 10:31:51] [HY000][1030] Got error 168 from storage engine

[root@my-08-01 conf]# grep t_list_1 schema.xml     
                <table name="t_list_1" dataNode="dn1,dn2" rule="sharding-province" />

[root@my-08-01 conf]# grep t_hash_1 schema.xml 
                <table name="t_hash_1" dataNode="dn1,dn2" rule="sharding-province" />

[root@my-08-01 bin]# ./mycat restart
Stopping Mycat-server...
Mycat-server was not running.
Starting Mycat-server...

use test;
CREATE TABLE t_hash_1(
  id int unsigned primary key ,
  name VARCHAR(200) NOT NULL ,
  province_id INT UNSIGNED NOT NULL
)
PARTITION BY HASH ( id ) PARTITIONS 2(
  PARTITION p0
  DATA DIRECTORY ="/mnt/p0/data",
  PARTITION p1
  DATA DIRECTORY ="/mnt/p1/data"
  );

mysql> show engines;
ERROR 2006 (HY000): MySQL server has gone away
No connection. Trying to reconnect...
Connection id:    5
Current database: *** NONE ***

+--------------------+---------+----------------------------------------------------------------------------+--------------+------+------------+
| Engine             | Support | Comment                                                                    | Transactions | XA   | Savepoints |
+--------------------+---------+----------------------------------------------------------------------------+--------------+------+------------+
| PERFORMANCE_SCHEMA | YES     | Performance Schema                                                         | NO           | NO   | NO         |
| MRG_MYISAM         | YES     | Collection of identical MyISAM tables                                      | NO           | NO   | NO         |
| CSV                | YES     | CSV storage engine                                                         | NO           | NO   | NO         |
| BLACKHOLE          | YES     | /dev/null storage engine (anything you write to it disappears)             | NO           | NO   | NO         |
| InnoDB             | DEFAULT | Percona-XtraDB, Supports transactions, row-level locking, and foreign keys | YES          | YES  | YES        |
| MEMORY             | YES     | Hash based, stored in memory, useful for temporary tables                  | NO           | NO   | NO         |
| ARCHIVE            | YES     | Archive storage engine                                                     | NO           | NO   | NO         |
| MyISAM             | YES     | MyISAM storage engine                                                      | NO           | NO   | NO         |
| FEDERATED          | NO      | Federated MySQL storage engine                                             | NULL         | NULL | NULL       |
+--------------------+---------+----------------------------------------------------------------------------+--------------+------+------------+
9 rows in set (0.00 sec)

mysql> show plugins;
....
....
| TokuDB_background_job_status  | ACTIVE   | INFORMATION SCHEMA | ha_tokudb.so         | GPL     |
| TokuDB_file_map               | ACTIVE   | INFORMATION SCHEMA | ha_tokudb.so         | GPL     |
| TokuDB_fractal_tree_block_map | ACTIVE   | INFORMATION SCHEMA | ha_tokudb.so         | GPL     |
| TokuDB_fractal_tree_info      | ACTIVE   | INFORMATION SCHEMA | ha_tokudb.so         | GPL     |
| TokuDB_locks                  | ACTIVE   | INFORMATION SCHEMA | ha_tokudb.so         | GPL     |
| TokuDB_lock_waits             | ACTIVE   | INFORMATION SCHEMA | ha_tokudb.so         | GPL     |
| TokuDB_trx                    | ACTIVE   | INFORMATION SCHEMA | ha_tokudb.so         | GPL     |
| validate_password             | ACTIVE   | VALIDATE PASSWORD  | validate_password.so | GPL     |
+-------------------------------+----------+--------------------+----------------------+---------+

mysql> INSTALL PLUGIN tokudb SONAME 'ha_tokudb.so';                  
ERROR 2013 (HY000): Lost connection to MySQL server during query

mysql> INSTALL PLUGIN tokudb_file_map SONAME 'ha_tokudb.so';
ERROR 2006 (HY000): MySQL server has gone away
No connection. Trying to reconnect...
Connection id:    4
Current database: *** NONE ***

ERROR 1125 (HY000): Function 'tokudb_file_map' already exists

ERROR 2013 (HY000): Lost connection to MySQL server during query