loaders thereof
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-18815'>FLINK-18815</a>] -         AbstractCloseableRegistryTest.testClose unstable
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-18821'>FLINK-18821</a>] -         Netty client retry mechanism may cause PartitionRequestClientFactory#createPartitionRequestClient to wait infinitely
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-18859'>FLINK-18859</a>] -         ExecutionGraphNotEnoughResourceTest.