[ https://issues.apache.org/jira/browse/FLINK-2491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16649234#comment-16649234 ]
Congxian Qiu commented on FLINK-2491: ------------------------------------- Hi all, what's the status of the issue, is it still needed? I'm interested in this, did there any resources I can refer. IMO, this could do by the following two ways: 1) add unregister operator instances operation in CheckpointCoordinator 2) triggerCheckpoint with `tasksToTrigger`, `tasksToWaitFor` and `tasksToCommitTo` > Checkpointing only works if all operators/tasks are still running > ----------------------------------------------------------------- > > Key: FLINK-2491 > URL: https://issues.apache.org/jira/browse/FLINK-2491 > Project: Flink > Issue Type: Bug > Components: DataStream API, State Backends, Checkpointing > Affects Versions: 0.10.0 > Reporter: Robert Metzger > Assignee: Márton Balassi > Priority: Critical > > While implementing a test case for the Kafka Consumer, I came across the > following bug: > Consider the following topology, with the operator parallelism in parentheses: > Source (2) --> Sink (1). > In this setup, the {{snapshotState()}} method is called on the source, but > not on the Sink. > The sink receives the generated data. > only one of the two sources is generating data. > I've implemented a test case for this, you can find it here: > https://github.com/rmetzger/flink/blob/para_checkpoint_bug/flink-tests/src/test/java/org/apache/flink/test/checkpointing/ParallelismChangeCheckpoinedITCase.java -- This message was sent by Atlassian JIRA (v7.6.3#76005)