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Esfand S

Idempotence & multiple task execution - Google App Engine | Google Groups - 0 views

  • The decision to rerun a task is done based on the HTTP response code. There is always a response code, even when the connection is lost. When the code is 200 the task is considered complete and will not be rerun. Any other code means the task needs a rerun. The time between the reruns is increased with each retry. This means a certain task is never retried in parallel. But it could be that a task created later will finish first because it did not need to retry.
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