Kanak Biscuitwala created HELIX-457:
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Summary: Add callbacks for checkpointing and restoring tasks
Key: HELIX-457
URL: https://issues.apache.org/jira/browse/HELIX-457
Project: Apache Helix
Issue Type: Sub-task
Reporter: Kanak Biscuitwala
Tasks may run for long enough that they want to be able to persist and recover
state. We can simplify this process by having explicit callbacks and states for
these steps.
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