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Retry with exponential backoff #9

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Retry with exponential backoff#9

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@charles-cooper
charles-cooper
opened on Feb 9, 2018

Reading the implementation for withPayloadDB,

postgresql-queue/src/Database/PostgreSQL/Simple/Queue.hs

Lines 227 to 229 in 6a9c220

-- Retry on failure up to retryCount
handle (\e -> when (pAttempts < retryCount)
(void $ retryDB schemaName pValue pAttempts)
, it looks like there is no strategy for backoff. Would it be better to implement some sort of backoff strategy within postgresql-simple-queue or do have a client-side implementation? E.g.

forever $ do
  withPayloadDB "public" 5 $ \payload -> do
    tryProcessPayload
  sleep 10 -- or something more complicated based on `pModifiedAt` and `pAttempts`

Activity

  1. jfischoff commented on May 3, 2018

    @jfischoff
    jfischoff
    on May 3, 2018
    Owner

    Just saw this. Yeah retry with exponential backoff sounds like a improvement.

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