楼主应该缺少一些参数，这里摘自官网，楼主可以参考下：

Kafka Source


[mw_shl_code=bash,true]tier1.sources.source1.type = org.apache.flume.source.kafka.KafkaSource
tier1.sources.source1.channels = channel1
tier1.sources.source1.zookeeperConnect = localhost:2181
tier1.sources.source1.topic = test1
tier1.sources.source1.groupId = flume
tier1.sources.source1.kafka.consumer.timeout.ms = 100[/mw_shl_code]

Kafka Sink
[mw_shl_code=bash,true]a1.sinks.k1.type = org.apache.flume.sink.kafka.KafkaSink
a1.sinks.k1.topic = mytopic
a1.sinks.k1.brokerList = localhost:9092
a1.sinks.k1.requiredAcks = 1
a1.sinks.k1.batchSize = 20
a1.sinks.k1.channel = c1[/mw_shl_code]

Kafka Channel
[mw_shl_code=bash,true]a1.channels.channel1.type   = org.apache.flume.channel.kafka.KafkaChannel
a1.channels.channel1.capacity = 10000
a1.channels.channel1.transactionCapacity = 1000
a1.channels.channel1.brokerList=kafka-2:9092,kafka-3:9092
a1.channels.channel1.topic=channel1
a1.channels.channel1.zookeeperConnect=kafka-1:2181[/mw_shl_code]

错误应该还有的，提供的不够完整，需要提供完整一些。配置也是。