zhijiang created FLINK-12842:
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Summary: Fix invalid check released state during
ResultPartition#createSubpartitionView
Key: FLINK-12842
URL: https://issues.apache.org/jira/browse/FLINK-12842
Project: Flink
Issue Type: Sub-task
Components: Runtime / Network
Reporter: zhijiang
Assignee: zhijiang
Currently in {{ResultPartition#createSubpartitionView}} it would check whether
this partition is released before creating view. But this check is based on
{{refCnt != -1}} which seems invalid, because the reference counter would not
always reflect the released state.
In the case of {{ResultPartition#release/fail}}, the reference counter is not
set to -1. Even if in the case of {{ResultPartition#onConsumedSubpartition}},
the reference counter seems also no chance to be -1.
So we could check the real {{isReleased}} state during creating view instead of
reference counter.
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