Null pointer when gracefully stopping the MySQL connector

2016-08-16 13:33:00,140 INFO   ||  Starting graceful shutdown of thread WorkerSourceTask-inventory-connector-0   [org.apache.kafka.connect.util.ShutdownableThread]
2016-08-16 13:33:00,140 INFO   ||  Stopping MySQL connector task   [io.debezium.connector.mysql.MySqlConnectorTask]
2016-08-16 13:33:00,141 INFO   ||  Connector task successfully stopped   [io.debezium.connector.mysql.MySqlConnectorTask]
Exception in thread "Thread-1" java.lang.NullPointerException
	at io.debezium.connector.mysql.MySqlConnectorTask.stop(MySqlConnectorTask.java:155)
	at org.apache.kafka.connect.runtime.WorkerSourceTask$WorkerSourceTaskThread.startGracefulShutdown(WorkerSourceTask.java:378)
	at org.apache.kafka.connect.runtime.WorkerSourceTask.stop(WorkerSourceTask.java:108)
	at org.apache.kafka.connect.runtime.Worker.stop(Worker.java:136)
	at org.apache.kafka.connect.runtime.Connect.stop(Connect.java:72)
	at org.apache.kafka.connect.runtime.Connect$ShutdownHook.run(Connect.java:93)