Yun Gao created FLINK-21085:
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Summary: Refactor StreamTask hierarchy to support triggering
checkpoint via RPC for non-source tasks
Key: FLINK-21085
URL: https://issues.apache.org/jira/browse/FLINK-21085
Project: Flink
Issue Type: Sub-task
Components: Runtime / Checkpointing
Reporter: Yun Gao
For checkpoint considering finished tasks, non-source tasks might get triggered
for checkpoint via RPC if they become the new "root" tasks. In this case, they
would notify their CheckpointBarrierHandle for this checkpoint.
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