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Posted to issues@flink.apache.org by "Stefan Richter (JIRA)" <ji...@apache.org> on 2018/02/28 13:00:00 UTC
[jira] [Commented] (FLINK-8413) Snapshot state of aggregated data
is not maintained in flink's checkpointing
[ https://issues.apache.org/jira/browse/FLINK-8413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16380262#comment-16380262 ]
Stefan Richter commented on FLINK-8413:
---------------------------------------
[~suganyap] and [~aljoscha] are there any updates on this or should we close the issue?
> Snapshot state of aggregated data is not maintained in flink's checkpointing
> ----------------------------------------------------------------------------
>
> Key: FLINK-8413
> URL: https://issues.apache.org/jira/browse/FLINK-8413
> 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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