kafka connect 启动后，报错：Task is being killed and will not recover until manually restarted？

在kafka connect 启动执行命令：

bin/connect-standalone.sh config/connect-standalone.properties \
 config/connect-file-source.properties

之后，报错，然后一直刷：

[2018-09-19 11:07:51,308] ERROR WorkerSinkTask{id=local-file-sink-0} Task is being killed and will not recover until manually restarted (org.apache.kafka.connect.runtime.WorkerTask:178)
[2018-09-19 11:08:00,855] INFO WorkerSourceTask{id=local-file-source-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask:397)
[2018-09-19 11:08:00,856] INFO WorkerSourceTask{id=local-file-source-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask:414)
[2018-09-19 11:08:00,864] INFO WorkerSourceTask{id=local-file-source-0} Finished commitOffsets successfully in 9 ms (org.apache.kafka.connect.runtime.WorkerSourceTask:496)
[2018-09-19 11:08:10,865] INFO WorkerSourceTask{id=local-file-source-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask:397)
[2018-09-19 11:08:10,866] INFO WorkerSourceTask{id=local-file-source-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask:414)
[2018-09-19 11:08:20,867] INFO WorkerSourceTask{id=local-file-source-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSourceTask:397)

消费消息能够显示：

{"schema":{"type":"string","optional":false},"payload":"foo"}
{"schema":{"type":"string","optional":false},"payload":"bar"}
{"schema":{"type":"string","optional":false},"payload":"Another line"}
{"schema":{"type":"string","optional":false},"payload":"lijieine"}
{"schema":{"type":"string","optional":false},"payload":"lindcvsde"}

但是test.sink.txt中无值：

[root@localhost data]# cat test.sink.txt 
[root@localhost data]#