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docs: updated for new duplicate task handling

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Ilan Steemers
2016-01-20 14:17:41 +01:00
parent c75ab4e7f0
commit 2fbfeaf5eb
1 changed files with 5 additions and 2 deletions
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7
docs/brokers.rst
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@@ -18,8 +18,11 @@ Some pointers:
* Don't set the :ref:`retry` timer to a lower or equal number than the task timeout.
* Retry time includes time the task spends waiting in the clusters internal queue.
* Don't set the :ref:`queue_limit` so high that tasks time out while waiting to be processed.
* In case a task is worked on twice, you will see a duplicate key error in the cluster logs.
* Duplicate tasks do generate additional receipt messages, but the result is discarded in favor of the first result.
* In case a task is worked on twice, the task result will be updated with the latest results.
* In some rare cases a non-atomic broker will re-queue a task after it has been acknowledged.
* If a task runs twice and a previous run has succeeded, the new result wil be discarded.
* Limiting the number of retries is handled globally in your actual broker's settings.
Support for more brokers is being worked on.