Zhijiang created FLINK-17719:
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Summary: Provide ChannelStateReader#hasStates for hints of reading
channel states
Key: FLINK-17719
URL: https://issues.apache.org/jira/browse/FLINK-17719
Project: Flink
Issue Type: Sub-task
Components: Runtime / Checkpointing, Runtime / Task
Reporter: Zhijiang
Assignee: Zhijiang
Currently we rely on whether unaligned checkpoint is enabled to determine
whether to read recovered states during task startup, then it will block the
requirements of recovery from previous unaligned states even though the current
mode is aligned.
We can make `ChannelStateReader` provide the hint whether there are any channel
states to be read during startup, then we will never lose any chances to
recover from them.
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