Partition reassignment data file is empty

[allen chan]

Hello

Kafka Version: 0.11.0.1

I am trying to increase replication factor for a topic and i am getting the
below error. Can anyone help explain what the error means? The json is not
empty

$ cat increase-replication-factor.json
{"version":1,
  "partitions":[
     {"topic":"metrics","partition":0,"replicas":[1,2]},
     {"topic":"metrics","partition":1,"replicas":[2,3]},
]}

$ sudo /opt/kafka/kafka_2.12-0.11.0.1/bin/kafka-reassign-partitions.sh
--zookeeper server1:2181 --reassignment-json-file
increase-replication-factor.json --execute
Partitions reassignment failed due to Partition reassignment data file is
empty
kafka.common.AdminCommandFailedException: Partition reassignment data file
is empty
at
kafka.admin.ReassignPartitionsCommand$.parseAndValidate(ReassignPartitionsCommand.scala:188)
at
kafka.admin.ReassignPartitionsCommand$.executeAssignment(ReassignPartitionsCommand.scala:158)
at
kafka.admin.ReassignPartitionsCommand$.executeAssignment(ReassignPartitionsCommand.scala:154)
at
kafka.admin.ReassignPartitionsCommand$.main(ReassignPartitionsCommand.scala:51)
at
kafka.admin.ReassignPartitionsCommand.main(ReassignPartitionsCommand.scala)

Thanks
-- 
Allen Michael Chan