Github user fhueske commented on the issue:

    https://github.com/apache/flink/pull/2332
  
    Thanks for looking into the Cassandra connector. Maybe @zentol (who 
implemented the Cassandra connector) can comment how an HBase sink can be made 
fault-tolerant and what code could be reused for that.
    
    Idempotent (put, delete) and non-idempotent modifications (increment, 
append) have different implications on fault-tolerance semantics. I think it 
would be a good idea to separate both types of modifications to make this 
difference more clear.
    
    I would be OK updating the version update to HBase 1.1.6 or 1.2.x under the 
condition that these versions are backwards compatible to 1.1.2. @nielsbasjes, 
would that be OK for you as well? We have an ongoing discussion to merge batch 
and streaming connectors. So this code would end up in the same module as the 
batch `TableInputFormat` and we should keep the HBase versions synced.


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