shaomeng.wang created FLINK-19852:
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Summary: Managed memory released check can block IterativeTask
Key: FLINK-19852
URL: https://issues.apache.org/jira/browse/FLINK-19852
Project: Flink
Issue Type: Bug
Components: Runtime / Task
Affects Versions: 1.11.2, 1.11.1, 1.10.2, 1.11.0
Reporter: shaomeng.wang
Attachments: image-2020-10-28-17-48-28-395.png,
image-2020-10-28-17-48-48-583.png
UnsafeMemoryBudget#reserveMemory, called on TempBarrier, needs time to wait on
GC of all allocated/released managed memory at every iteration.
stack:
!image-2020-10-28-17-48-48-583.png!
new TempBarrier in BatchTask
!image-2020-10-28-17-48-28-395.png!
These will be very slow than before.
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