[jira] [Updated] (FLINK-14979) TwoPhaseCommitSink fails when checkpoint overtakes a savepoint

["Piotr Nowojski (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-14979?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Piotr Nowojski updated FLINK-14979:
-----------------------------------
    Component/s: Connectors / Kafka

> TwoPhaseCommitSink fails when checkpoint overtakes a savepoint
> --------------------------------------------------------------
>
>                 Key: FLINK-14979
>                 URL: https://issues.apache.org/jira/browse/FLINK-14979
>             Project: Flink
>          Issue Type: Bug
>          Components: API / DataStream, Connectors / Kafka
>    Affects Versions: 1.6.4, 1.7.2, 1.8.2, 1.9.1
>            Reporter: Piotr Nowojski
>            Priority: Major
>
> As [reported by a user on the user mailing list|http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/UNCHECKED-Error-while-confirming-Checkpoint-td23213.html], {{TwoPhaseCommitSinkFunction#notifyCheckpointComplete}} can fail with the following exception:
> {noformat}
> java.lang.RuntimeException: Error while confirming checkpoint
>     at org.apache.flink.runtime.taskmanager.Task$2.run(Task.java:1205)
>     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>     at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
>     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
>     at java.lang.Thread.run(Thread.java:748)
> Caused by: java.lang.IllegalStateException: checkpoint completed, but no transaction pending
>     at org.apache.flink.util.Preconditions.checkState(Preconditions.java:195)
>     at org.apache.flink.streaming.api.functions.sink.TwoPhaseCommitSinkFunction.notifyCheckpointComplete(TwoPhaseCommitSinkFunction.java:267)
>     at org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.notifyCheckpointComplete(AbstractUdfStreamOperator.java:130)
>     at org.apache.flink.streaming.runtime.tasks.StreamTask.notifyCheckpointComplete(StreamTask.java:822)
>     at org.apache.flink.runtime.taskmanager.Task$2.run(Task.java:1200)
>     ... 5 more
> {noformat}
> This can happen in the following scenario:
> # savepoint is triggered
> # checkpoint is triggered
> # checkpoint completes (but it doesn't subsume the savepoint, because checkpoints subsume only other checkpoints).  
> # savepoint completes
> In this case, {{TwoPhaseCommitSinkFunction}} receives first notification that the later checkpoint completed, it commits both savepoint and the checkpoint. Later when savepoint {{notifyCheckpointComplete}} arrives, the above error will occur. 
> Possible trivial fix is to remove that failing {{checkState}}.



--
This message was sent by Atlassian Jira
(v8.3.4#803005)