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Paul Lin commented on FLINK-15253: ---------------------------------- -1 There was a discussion about the accumulator's persistence[1], many users were in favor of making them checkpointed. [1][http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Preserve-accumulators-after-failure-in-DataStream-API-td27649.html] > Accumulators are not checkpointed > --------------------------------- > > Key: FLINK-15253 > URL: https://issues.apache.org/jira/browse/FLINK-15253 > Project: Flink > Issue Type: Bug > Components: Runtime / Checkpointing > Reporter: Maximilian Michels > Priority: Major > > Accumulators are not checkpointed which make them relatively useless for > streaming applications. They are also tight to the heartbeat (FLINK-15252), > which makes them fragile. > We could consider deactivating accumulators in streaming mode since they seem > to originally be a batch feature. -- This message was sent by Atlassian Jira (v8.3.4#803005)