[solved] Cassandra TApplicationError type: 6

Today I have got strange error while using cassandra:

me.prettyprint.hector.api.exceptions.HCassandraInternalException:
Cassandra encountered an internal error processing this request:
TApplicationError type: 6 message:Internal error processing
batch_mutate

It was because I am using OrderPreservingPartitioner with IntegerType as key validator.
Trying to insert key over 127 gives above error.
This partitioner sholud be used with one of String types (e.g. utf8).

Sollution: ByteOrderedPartitioner.