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https://issues.apache.org/jira/browse/FLINK-8447?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aljoscha Krettek closed FLINK-8447.
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Resolution: Duplicate
> CLONE - Snapshot state of aggregated data is not maintained in flink's
> checkpointing
> ------------------------------------------------------------------------------------
>
> Key: FLINK-8447
> URL: https://issues.apache.org/jira/browse/FLINK-8447
> Project: Flink
> Issue Type: Bug
> Components: State Backends, Checkpointing
> Affects Versions: 1.3.2
> Reporter: suganya
> Priority: Major
>
> We have a project which consumes events from kafka,does a groupby in a time
> window(5 mins),after window elapses it pushes the events to downstream for
> merge.This project is deployed using flink ,we have enabled checkpointing to
> recover from failed state.
> (windowsize: 5mins , checkpointingInterval: 5mins,state.backend: filesystem)
> Offsets from kafka get checkpointed every 5
> mins(checkpointingInterval).Before finishing the entire DAG(groupBy and
> merge) , events offsets are getting checkpointed.So incase of any restart
> from task-manager ,new task gets started from last successful checkpoint ,but
> we could'nt able to get the aggregated snapshot data(data from groupBy task)
> from the persisted checkpoint.
> Able to retrieve the last successful checkpointed offset from kafka ,but
> couldnt able to get last aggregated data till checkpointing.
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