Roman Khachatryan created FLINK-21233:
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Summary: Race condition in CheckpointCoordinator in finishing sync savepoint
Key: FLINK-21233
URL:
https://issues.apache.org/jira/browse/FLINK-21233 Project: Flink
Issue Type: Bug
Components: Runtime / Checkpointing
Affects Versions: 1.12.1, 1.11.3, 1.13.0
Reporter: Roman Khachatryan
I'm writing an integration test and see a failure from time to time (1 per 100 on my machine):
{code:java}
Caused by: java.util.concurrent.CompletionException: org.apache.flink.runtime.checkpoint.CheckpointException: CheckpointCoordinator shutdown.
{code}
Consider the final stage of the synchronous savepoint (started by stop with savepoint command):
# The last subtask ACKs the checkpoint
# CheckpointCoordinator finalizes the checkpoint and sends out confirmations
# EndOfPartition is generated on sources and flows through the graph
# Each Subtask notifies the Scheduler about its completion
# Upon receiving the last notification Scheduler shuts down CheckpointCoordinator
# CheckpointCoordinator aborts all pending checkpoing
Not that Scheduler and CheckpointCoordinator run in different threads.
So if savepoint finalization takes longer then it can be aborted before completion.
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