Getting None.get exception when running kafka-reassign-partitions.sh

[Calvin Lei]

Checked the json file and everything seems normal. When I run the script
and I got the error:

Partitions reassignment failed due to None.get
java.util.NoSuchElementException: None.get
   at scala.None$.get (Option.scala:185)

my json file:

{partitions":
   [{"topic": "topicA", "partition": 0}]
}


thanks in advance,
Cal