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https://issues.apache.org/jira/browse/FLINK-4714?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15895675#comment-15895675
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ASF GitHub Bot commented on FLINK-4714:
---------------------------------------
GitHub user tony810430 opened a pull request:
https://github.com/apache/flink/pull/3474
[FLINK-4714] [runtime] [streaming] Set task state to RUNNING after state
has been restored
The changes in this PR are
- add `open()` method in `AbstractInvokable` to let the invokable can be
initialized during `DEPLOYING` state in `Task`. The default behavior is do
nothing.
- separate `invokable.invoke()` into `invokable.open()` and
`invokable.invoke()` in `Task`, and transit task state from `DEPLOYING` to
`RUNNING` between them.
- `TaskCanceler` should be used to cancel the invokable in `DEPLOYING`
state because invokable might be called in that state now.
- update `StreamTask` and `StreamTaskTestHarness` to solve this issue in
FLINK-4714
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/tony810430/flink FLINK-4714
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/3474.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #3474
----
commit baa0285ce481db0f96d59ed71d86f81b1f5fcd65
Author: Tony Wei <[email protected]>
Date: 2017-03-03T08:46:22Z
[FLINK-4714] Set task state to RUNNING after state has been restored
----
> Set task state to RUNNING after state has been restored
> -------------------------------------------------------
>
> Key: FLINK-4714
> URL: https://issues.apache.org/jira/browse/FLINK-4714
> Project: Flink
> Issue Type: Improvement
> Components: Distributed Coordination, State Backends, Checkpointing
> Affects Versions: 1.2.0
> Reporter: Till Rohrmann
> Assignee: Wei-Che Wei
>
> The task state is set to {{RUNNING}} as soon as the {{Task}} is executed.
> That, however, happens before the state of the {{StreamTask}} invokable has
> been restored. As a result, the {{CheckpointCoordinator}} starts to trigger
> checkpoints even though the {{StreamTask}} is not ready.
> In order to avoid aborting checkpoints and properly start it, we should
> switch the task state to {{RUNNING}} after the state has been restored.
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