NullPointerException when use kafka callback

hudi.conf:

hoodie.write.commit.callback.on true
hoodie.write.commit.callback.class org.apache.hudi.utilities.callback.kafka.HoodieWriteCommitKafkaCallback

hoodie.write.commit.callback.kafka.bootstrap.servers localhost:9082
hoodie.write.commit.callback.kafka.topic hudi-callback

hoodie.write.commit.callback.kafka.partition 1