ited string
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-19300'>FLINK-19300</a>] -         Timer loss after restoring from savepoint
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-19321'>FLINK-19321</a>] -         CollectSinkFunction does not define serialVersionUID
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-19338'>FLINK-19338</a>] -         New source interface cannot unregister unregistered source
</li>
<li>[<a href='https://issues.apache.org/jira/b