Hey,

As a learning exercise, I've created a flow that parses a kafka topic of json 
messages and inserts them into Cassandra.  It's a three column table: id 
(text), ts (timestamp), and value (float).  I set cql.args.x.type to the proper 
data types for each column.

PutCassandraQL is failing with the following:

org.apache.nifi.processor.exception.ProcessException: The value of the 
cql.args.2.value is '2016-06-21T20:23:41Z', which cannot be converted into the 
necessary data type: timestamp

This happens for each timestamp, but I'm pretty sure the format is correct.  
It's in ISO-8601, and I'm able to insert them manually into the c* table.  I'm 
on Nifi 0.6.1.

Any help would be appreciated, thanks!

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