I am trying to read kafka and save the data as parquet file on hdfs according to this  https://stackoverflow.com/questions/45827664/read-from-kafka-and-write-to-hdfs-in-parquet   

The code is similar to :
val df = spark
  .option("kafka.bootstrap.servers", "host1:port1,host2:port2")
  .option("subscribe", "topic1")
while I am writing in Java. 

However, I keep throwing the following warning:
CachedKafkaConsumer: CachedKafkaConsumer is not running in UninterruptibleThread. It may hang when CachedKafkaConsumer's method are interrupted because of KAFKA-1894. 

How to solve it? Thanks!

Junfeng Chen