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https://issues.apache.org/jira/browse/FLINK-14344?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Biao Liu updated FLINK-14344:
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Description:
Currently we snapshot the master hook state synchronously. As a part of
reworking threading model of {{CheckpointCoordinator}}, we have to make this
non-blocking to satisfy the requirement of running in main thread.
The behavior of snapshotting master hook state is similar to task state
snapshotting. Master state snapshotting is taken before task state
snapshotting. Because in master hook, there might be external system
initialization which task state snapshotting might depend on.
was:
Currently we snapshot the master hook state synchronously. As a part of
reworking threading model of {{CheckpointCoordinator}}, we have to make this
non-blocking to satisfy the requirement of running in main thread.
The behavior of snapshotting master hook state is similar to task state
snapshotting. Master state snapshotting is taken before task state
snapshotting. Because in master hook, there might be external system
initialization which task state snapshotting might depends on.
> Snapshot master hook state asynchronously
> -----------------------------------------
>
> Key: FLINK-14344
> URL: https://issues.apache.org/jira/browse/FLINK-14344
> Project: Flink
> Issue Type: Sub-task
> Components: Runtime / Checkpointing
> Reporter: Biao Liu
> Priority: Major
> Fix For: 1.10.0
>
>
> Currently we snapshot the master hook state synchronously. As a part of
> reworking threading model of {{CheckpointCoordinator}}, we have to make this
> non-blocking to satisfy the requirement of running in main thread.
> The behavior of snapshotting master hook state is similar to task state
> snapshotting. Master state snapshotting is taken before task state
> snapshotting. Because in master hook, there might be external system
> initialization which task state snapshotting might depend on.
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