es.apache.org/jira/browse/FLINK-18012'>FLINK-18012</a>] -         Deactivate slot timeout if TaskSlotTable.tryMarkSlotActive is called
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-18035'>FLINK-18035</a>] -         Executors#newCachedThreadPool could not work as expected
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-18045'>FLINK-18045</a>] -         Fix Kerberos credentials checking to unblock Flink on secured MapR
</li>
<li>[<a href='https://issues.apache.org/jira/browse