我使用debezium-kafka来捕获MySQL中的更改。对于MySQL，我使用AWSRDS。我启用了GTID的读取副本配置。我已经将debezium与副本连接起来。

但是运行几天后，debezium错误地失败了：

org.apache.kafka.connect.errors.ConnectException: Cannot replicate because the master purged required binary logs. Replicate the missing transactions from elsewhere, or provision a new slave from backup. Consider increasing the master's binary log expiration period. To find the missing transactions, see the master's error log or the manual for GTID_SUBTRACT. Error code: 1236; SQLSTATE: HY000.
tat io.debezium.connector.mysql.AbstractReader.wrap(AbstractReader.java:230)
tat io.debezium.connector.mysql.AbstractReader.failed(AbstractReader.java:197)
tat io.debezium.connector.mysql.BinlogReader$ReaderThreadLifecycleListener.onCommunicationFailure(BinlogReader.java:1018)
tat com.github.shyiko.mysql.binlog.BinaryLogClient.listenForEventPackets(BinaryLogClient.java:950)
tat com.github.shyiko.mysql.binlog.BinaryLogClient.connect(BinaryLogClient.java:580)
tat com.github.shyiko.mysql.binlog.BinaryLogClient$7.run(BinaryLogClient.java:825)
tat java.base/java.lang.Thread.run(Thread.java:834)
aused by: com.github.shyiko.mysql.binlog.network.ServerException: Cannot replicate because the master purged required binary logs. Replicate the missing transactions from elsewhere, or provision a new slave from backup. Consider increasing the master's binary log expiration period. To find the missing transactions, see the master's error log or the manual for GTID_SUBTRACT.
tat com.github.shyiko.mysql.binlog.BinaryLogClient.listenForEventPackets(BinaryLogClient.java:914)
t... 3 more

我无法找出导致问题的原因，MYSQL master和副本都正常，都已启动并运行。那为什么debezium失败了？