 using RebalancePartitioner. 
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-15467'>FLINK-15467</a>] -         Should wait for the end of the source thread during the Task cancellation
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-16510'>FLINK-16510</a>] -         Task manager safeguard shutdown may not be reliable
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-16827'>FLINK-16827</a>] -         StreamExecTemporalSort should require a distribution trait in 