Stephan Ewen created FLINK-4417:
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Summary: Checkpoints should be subsumed by CheckpointID not, by
timestamp
Key: FLINK-4417
URL: https://issues.apache.org/jira/browse/FLINK-4417
Project: Flink
Issue Type: Bug
Components: State Backends, Checkpointing
Affects Versions: 1.1.2
Reporter: Stephan Ewen
Fix For: 1.2.0
Since the system clocks cannot be expected to be stable/monotonous, the
subsumption logic in the checkpoint coordinator should not decide which
checkpoint is "newer" based on the system time.
The checkpoint ID is guaranteed to be strictly monotonously increasing. It is a
better measure to decide which checkpoint is newer.
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