Pramod Immaneni created APEXCORE-339:
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Summary: Support ability to tag operators as idempotent or
non-idempotent
Key: APEXCORE-339
URL: https://issues.apache.org/jira/browse/APEXCORE-339
Project: Apache Apex Core
Issue Type: Bug
Reporter: Pramod Immaneni
Assignee: Pramod Immaneni
Certain application require idempotency and some others don't. Additionally
operators such as input operators need to be specially instrumented to exhibit
idempotent behavior. Certain output operators like database operators rely on
idempotency. For these reasons we need ability to label operators as idempotent
or now, whether output operators require idempotency from upstream operators or
not. In case of a failure the platform should handle non-idempotent streams by
restarting the failed operator and all downsteram operators at the same
checkpoint.
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