[jira] [Created] (FLINK-24068) CheckpointBarrierHandler may skip the markAlignmentStart for alignment -with-timeout checkpoint

["Yun Gao (Jira)" <ji...@apache.org>]

Yun Gao created FLINK-24068:
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             Summary: CheckpointBarrierHandler may skip the markAlignmentStart for alignment -with-timeout checkpoint
                 Key: FLINK-24068
                 URL: https://issues.apache.org/jira/browse/FLINK-24068
             Project: Flink
          Issue Type: Sub-task
          Components: Runtime / Checkpointing
    Affects Versions: 1.14.0
            Reporter: Yun Gao


{code:java}
04:51:11,727 [Flat Map -> Sink: Unnamed (10/12)#1] WARN org.apache.flink.runtime.taskmanager.Task [] - Flat Map -> Sink: Unnamed (10/12)#1 (0d965fd3c0de11dc7fb6793435cda8ba) switched from RUNNING to FAILED with failure cause: java.lang.IllegalStateException: Alignment time is less than zero({}). Is the time monotonic? [-9223369873401849363]
 at org.apache.flink.util.Preconditions.checkState(Preconditions.java:215)
 at org.apache.flink.streaming.runtime.io.checkpointing.CheckpointBarrierHandler.markAlignmentEnd(CheckpointBarrierHandler.java:181)
 at org.apache.flink.streaming.runtime.io.checkpointing.CheckpointBarrierHandler.markAlignmentEnd(CheckpointBarrierHandler.java:177)
 at org.apache.flink.streaming.runtime.io.checkpointing.SingleCheckpointBarrierHandler.checkCheckpointAlignedAndTransformState(SingleCheckpointBarrierHandler.java:253)
 at org.apache.flink.streaming.runtime.io.checkpointing.SingleCheckpointBarrierHandler.processBarrier(SingleCheckpointBarrierHandler.java:240)
 at org.apache.flink.streaming.runtime.io.checkpointing.CheckpointedInputGate.handleEvent(CheckpointedInputGate.java:181)
 at org.apache.flink.streaming.runtime.io.checkpointing.CheckpointedInputGate.pollNext(CheckpointedInputGate.java:159)
 at org.apache.flink.streaming.runtime.io.AbstractStreamTaskNetworkInput.emitNext(AbstractStreamTaskNetworkInput.java:110)
 at org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:65)
 at org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:490)
{code}

This is caused due to:
# SingleCheckpointBarrierHandler first receive a BarrierAnnouncement, which would call checkNewCheckpoint to reset the currentCheckpointId and the alignedChannels.
# SingleCheckpointBarrierHandler then received an EndOfPartition, which would add the channel to the alignedChannels.
# SingleCheckpointBarrierHandler then received a barrier, which would found that the alignedChannels is already not empty, then it would skip the markAlignmentStart. 

We might change 3 to judge if this is the first barrier to receive.



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