[jira] [Created] (FLINK-17413) Remove redundant states from ThreadSafeUnaligner

[Shang Yuanchun (Jira)]

Zhijiang created FLINK-17413:
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             Summary: Remove redundant states from ThreadSafeUnaligner
                 Key: FLINK-17413
                 URL: https://issues.apache.org/jira/browse/FLINK-17413
             Project: Flink
          Issue Type: Sub-task
          Components: Runtime / Checkpointing
            Reporter: Zhijiang
            Assignee: Zhijiang


In RemoteInputChannel, we already have the states  of `lastRequestedCheckpointId` and `receivedCheckpointId` to control whether the received buffer should be notified to unaligner component. 

In current ThreadSafeUnaligner, the variable `storeNewBuffers` is also used for similar purpose to deciding whether the notified buffer should be written into persister. In other words, as long as the `RemoteInputChannel` decides to notify this received buffer, it should be always needed to spill. So we can remove the variable `storeNewBuffers` from ThreadSafeUnaligner completely.



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