Github user aljoscha commented on the pull request:
https://github.com/apache/flink/pull/202#issuecomment-94402978
I was referring to the way that communication is handled between the java
host and the generic language client: Communication between them is not based
on a fixed set of Messages (for example, messages defined using something like
Protobuf or Avro) but instead the knowledge about how messages are structured
is implicit in the code that does the messaging. So the java side expects a
sequence of primitives (integers, strings) in a certain order and the python
side knows that order and sends them in this order.
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