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https://issues.apache.org/jira/browse/FLINK-6620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17321655#comment-17321655
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Flink Jira Bot commented on FLINK-6620:
---------------------------------------
This issue and all of its Sub-Tasks have not been updated for 180 days. So, it
has been labeled "stale-minor". If you are still affected by this bug or are
still interested in this issue, please give an update and remove the label. In
7 days the issue will be closed automatically.
> Add KeyGroupCheckpointedOperator interface that works for checkpointing
> key-groups
> ----------------------------------------------------------------------------------
>
> Key: FLINK-6620
> URL: https://issues.apache.org/jira/browse/FLINK-6620
> Project: Flink
> Issue Type: Improvement
> Components: API / DataStream
> Reporter: Jingsong Lee
> Priority: Minor
> Labels: stale-minor
>
> [~aljoscha] We have discussed it on:
> https://issues.apache.org/jira/browse/BEAM-1393
> {code}
> /**
> * This interface is used to checkpoint key-groups state.
> */
> public interface KeyGroupCheckpointedOperator extends
> KeyGroupRestoringOperator{
> /**
> * Snapshots the state for a given {@code keyGroupIdx}.
> *
> * <p>AbstractStreamOperator would call this hook in
> * AbstractStreamOperator.snapshotState() while iterating over the key
> groups.
> * @param keyGroupIndex the id of the key-group to be put in the snapshot.
> * @param out the stream to write to.
> */
> void snapshotKeyGroupState(int keyGroupIndex, DataOutputStream out) throws
> Exception;
> }
> {code}
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