slot reports of unknown task manager
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-16717'>FLINK-16717</a>] -         Use headless service for rpc and blob port when flink on K8S
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-17248'>FLINK-17248</a>] -         Make the thread nums of io executor of ClusterEntrypoint and MiniCluster configurable
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-17503'>FLINK-17503</a>] -         Make memory configuration logging 