How to configure install semi-synchronous replication in MySQL 5.5

Confirm that the have_dynamic_loading is open on master and slave

Master

MASTER (none) 10:54:58>show variables like ' have_dynamic_loading ';

+----------------------+-------+

| variable_name | Value |

+----------------------+-------+

| have_dynamic_loading | YES |

+----------------------+-------+

Slave

Slavetest 10:47:52>show variables like ' have_dynamic_loading ';

+----------------------+-------+

| variable_name | Value |

+----------------------+-------+

| have_dynamic_loading | YES |

+----------------------+-------+

Install a half-sync plugin on master using root

MASTER (None) 10:58:14>

MASTER (none) 10:58:14>install plugin rpl_semi_sync_master soname ' semisync_master.so ';

Query OK, 0 rows affected (0.01 sec)

MASTER (none) 10:58:22>show plugins;

+--------------------------+--------+--------------------+--------------------+---------+

| Name | Status | Type | Library | License |

+--------------------------+--------+--------------------+--------------------+---------+

| Binlog | ACTIVE | STORAGE ENGINE | NULL | GPL |

| Mysql_native_password | ACTIVE | Authentication | NULL | GPL |

| Mysql_old_password | ACTIVE | Authentication | NULL | GPL |

| Mrg_myisam | ACTIVE | STORAGE ENGINE | NULL | GPL |

| CSV | ACTIVE | STORAGE ENGINE | NULL | GPL |

| MEMORY | ACTIVE | STORAGE ENGINE | NULL | GPL |

| MyISAM | ACTIVE | STORAGE ENGINE | NULL | GPL |

| InnoDB | ACTIVE | STORAGE ENGINE | NULL | GPL |

| Innodb_trx | ACTIVE | Information SCHEMA | NULL | GPL |

| Innodb_locks | ACTIVE | Information SCHEMA | NULL | GPL |

| Innodb_lock_waits | ACTIVE | Information SCHEMA | NULL | GPL |

| innodb_cmp | ACTIVE | Information SCHEMA | NULL | GPL |

| Innodb_cmp_reset | ACTIVE | Information SCHEMA | NULL | GPL |

| Innodb_cmpmem | ACTIVE | Information SCHEMA | NULL | GPL |

| Innodb_cmpmem_reset | ACTIVE | Information SCHEMA | NULL | GPL |

| Innodb_buffer_page | ACTIVE | Information SCHEMA | NULL | GPL |

| Innodb_buffer_page_lru | ACTIVE | Information SCHEMA | NULL | GPL |

| Innodb_buffer_pool_stats | ACTIVE | Information SCHEMA | NULL | GPL |

| Blackhole | ACTIVE | STORAGE ENGINE | NULL | GPL |

| ARCHIVE | ACTIVE | STORAGE ENGINE | NULL | GPL |

| Federated | ACTIVE | STORAGE ENGINE | NULL | GPL |

| Performance_schema | ACTIVE | STORAGE ENGINE | NULL | GPL |

| Partition | ACTIVE | STORAGE ENGINE | NULL | GPL |

| Rpl_semi_sync_master | ACTIVE | REPLICATION | semisync_master.so | GPL |

+--------------------------+--------+--------------------+--------------------+---------+

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