我想写Kafka消息到mysql数据库。在这个链接中有一个例子。在该示例中，apacheflume用于消费消息并将其写入mysql。我使用相同的代码，当我运行 flume-ng agent 以及 event 总是变成 null 还有我的 flume.conf.properties 文件是：

agent.sources=kafkaSrc
agent.channels=channel1
agent.sinks=jdbcSink

agent.channels.channel1.type=org.apache.flume.channel.kafka.KafkaChannel
agent.channels.channel1.brokerList=localhost:9092
agent.channels.channel1.topic=kafkachannel
agent.channels.channel1.zookeeperConnect=localhost:2181
agent.channels.channel1.capacity=10000
agent.channels.channel1.transactionCapacity=1000
agent.channels.channel1.parseAsFlumeEvent=false

agent.sources.kafkaSrc.type = org.apache.flume.source.kafka.KafkaSource
agent.sources.kafkaSrc.channels = channel1
agent.sources.kafkaSrc.zookeeperConnect = localhost:2181
agent.sources.kafkaSrc.topic = kafka-mysql

agent.sinks.jdbcSink.type = com.stratio.ingestion.sink.jdbc.JDBCSink
agent.sinks.jdbcSink.connectionString = jdbc:mysql://127.0.0.1:3306/test?useSSL=false
agent.sinks.jdbcSink.username=root
agent.sinks.jdbcSink.password=pass
agent.sinks.jdbcSink.batchSize = 10
agent.sinks.jdbcSink.channel =channel1
agent.sinks.jdbcSink.sqlDialect=MYSQL
agent.sinks.jdbcSink.driver=com.mysql.jdbc.Driver
agent.sinks.jdbcSink.sql=INSERT INTO kafkamsg(msg) VALUES(${body:varchar})

我错在哪里？
谢谢。