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Posted to issues@flink.apache.org by "Stephan Ewen (Jira)" <ji...@apache.org> on 2019/12/10 12:26:00 UTC

[jira] [Resolved] (FLINK-15132) Checkpoint Coordinator does Checkpoint I/O in JobMaster Main Thread

     [ https://issues.apache.org/jira/browse/FLINK-15132?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stephan Ewen resolved FLINK-15132.
----------------------------------
    Fix Version/s:     (was: 1.10.0)
       Resolution: Invalid

> Checkpoint Coordinator does Checkpoint I/O in JobMaster Main Thread
> -------------------------------------------------------------------
>
>                 Key: FLINK-15132
>                 URL: https://issues.apache.org/jira/browse/FLINK-15132
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / Checkpointing
>            Reporter: Stephan Ewen
>            Priority: Blocker
>
> The {{PendingCheckpoint.completePendingCheckpoint()}} method is called synchronously from within the Scheduler / JobMaster Main Thread.
> The method writes out the checkpoint metadata, which is a potentially blocking I/O method.
> Because the target may block arbitrarily long (for example S3 when load throttling), this can bring down the entire cluster (blocking actor threads, heartbeat timeouts).



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