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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] [Closed] (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 closed FLINK-15132.
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> 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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