[jira] [Resolved] (BEAM-3494) Snapshot state of aggregated data of apache beam project is not maintained in flink's checkpointing

["Maximilian Michels (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/BEAM-3494?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Maximilian Michels resolved BEAM-3494.
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       Resolution: Incomplete
    Fix Version/s: Not applicable

This is missing important information. We checkpoint in-flight data, so I don't see how something like you described is possible.

I'm closing but please feel free to re-open with more details on the issue.

> Snapshot state of aggregated data of apache beam project is not maintained in flink's checkpointing 
> ----------------------------------------------------------------------------------------------------
>
>                 Key: BEAM-3494
>                 URL: https://issues.apache.org/jira/browse/BEAM-3494
>             Project: Beam
>          Issue Type: Bug
>          Components: runner-flink
>            Reporter: suganya
>            Priority: Major
>             Fix For: Not applicable
>
>
> We have a beam 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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