g/jira/browse/FLINK-18600'>FLINK-18600</a>] -         Kerberized YARN per-job on Docker test failed to download JDK 8u251
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-18608'>FLINK-18608</a>] -         CustomizedConvertRule#convertCast drops nullability
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-18612'>FLINK-18612</a>] -         WordCount example failure when setting relative output path
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-18632'>FLINK-18632