='https://issues.apache.org/jira/browse/FLINK-18836'>FLINK-18836</a>] -         Python UDTF doesn&#39;t work well when the return type isn&#39;t generator
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-18915'>FLINK-18915</a>] -         FIXED_PATH(dummy Hadoop Path) with WriterImpl may cause ORC writer OOM
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-19022'>FLINK-19022</a>] -         AkkaRpcActor failed to start but no exception information
</li>
<li>[<a href='https://issu