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Posted to dev@kafka.apache.org by "Boyang Chen (Jira)" <ji...@apache.org> on 2020/06/03 22:46:00 UTC

[jira] [Created] (KAFKA-10097) Avoid getting null map for task checkpoint

Boyang Chen created KAFKA-10097:
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             Summary: Avoid getting null map for task checkpoint
                 Key: KAFKA-10097
                 URL: https://issues.apache.org/jira/browse/KAFKA-10097
             Project: Kafka
          Issue Type: Improvement
            Reporter: Boyang Chen


In StreamTask, we have the logic to generate a checkpoint offset map to be materialized through StateManager#checkpoint. This map could be either empty map or null, which the former case indicates to only pull down existing state store checkpoint data, while the latter indicates no need to do a checkpoint in the case such as we are suspending a task.

Having two similar special logics for checkpointing could lead to unexpected bugs, also we should think about separating the empty checkpoint case vs passed-in checkpoint case.



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