Flink CDC 读取 MySQL 报错解决

报错内容

Flink CDC 读取 MySQL 的用户有需要表的读写权限，但是报错。

less 复制代码

io.debezium.DebeziumException: Access denied; you need (at least one of) the REPLICATION SLAVE privilege(s) for this operation Error code: 1227; SQLSTATE: 42000.
	at io.debezium.connector.mysql.MySqlStreamingChangeEventSource.wrap(MySqlStreamingChangeEventSource.java:1489) ~[flink-1.0.jar:?]
	at io.debezium.connector.mysql.MySqlStreamingChangeEventSource$ReaderThreadLifecycleListener.onCommunicationFailure(MySqlStreamingChangeEventSource.java:1545) [flink-1.0.jar:?]
	at com.github.shyiko.mysql.binlog.BinaryLogClient.listenForEventPackets(BinaryLogClient.java:1079) [flink-1.0.jar:?]
	at com.github.shyiko.mysql.binlog.BinaryLogClient.connect(BinaryLogClient.java:631) [flink-1.0.jar:?]
	at com.github.shyiko.mysql.binlog.BinaryLogClient$7.run(BinaryLogClient.java:932) [flink-1.0.jar:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_202]
Caused by: com.github.shyiko.mysql.binlog.network.ServerException: Access denied; you need (at least one of) the REPLICATION SLAVE privilege(s) for this operation
	at com.github.shyiko.mysql.binlog.BinaryLogClient.listenForEventPackets(BinaryLogClient.java:1043) ~[flink-1.0.jar:?]
	... 3 more

问题原因

错误信息提示你需要REPLICATION SLAVE权限。这个权限允许用户从MySQL主服务器复制（读取）二进制日志，这是进行MySQL复制所必须的权限。在你的情况下，Flink的Debezium connector正在尝试读取二进制日志以获取数据库的变更事件，因此需要这个权限。

解决方法

sql 复制代码

GRANT REPLICATION CLIENT ON *.* TO 'flink'@'%';
GRANT REPLICATION SLAVE ON *.* TO 'flink'@'%';
FLUSH PRIVILEGES;

REPLICATION CLIENT权限允许用户查询主服务器的二进制日志状态（通过SHOW MASTER STATUS命令）和从服务器的状态（通过SHOW SLAVE STATUS命令）。这个权限通常用于监控和管理MySQL的主从复制。

REPLICATION SLAVE权限允许用户从主服务器复制（读取）二进制日志。这是进行MySQL复制所必需的权限，也是Flink的Debezium connector需要的权限。

MySQL中，REPLICATION CLIENT和REPLICATION SLAVE是全局级别的权限，不能被授予特定的数据库或表