zhu.qing created FLINK-8526:
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Summary: When use some parallelism, the program will stuck in some
setting.
Key: FLINK-8526
URL: https://issues.apache.org/jira/browse/FLINK-8526
Project: Flink
Issue Type: Bug
Components: Cluster Management, Java API, Local Runtime
Affects Versions: 1.4.0
Environment: 8 machines(96GB and 24 cores) and 20 taskslot per
taskmanager. twitter-2010 dataset. And parallelism setting to 80. I run my code
in standalone mode.
Reporter: zhu.qing
Attachments: T2AdjActiveV.java, T2AdjMessage.java
The next program will stuck at some special parallelism in some situation. In
the code attached. And I want to know the relation between parallelism and
running task.When parallelism is 80. The program will always stuck. And when
parallelism is 100. everything goes well. And I found when the parallelism
equals to number of taskslots. The program is not fasted. And probably caused
network buffer not enough. How networker buffer related to parallelism
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