[GitHub] nickva opened a new pull request #843: Reduce replicator.retries_per_request value from 10 to 5

[gi...@git.apache.org]

nickva opened a new pull request #843: Reduce replicator.retries_per_request value from 10 to 5
URL: https://github.com/apache/couchdb/pull/843
 
 
   Previously an individual failed request would be tried 10 times in a row with
   an exponential backoff starting at 0.25 seconds. So the intervals in seconds
   would be:
   
      `0.25, 0.5, 1, 2, 4, 8, 16, 32, 64, 128`
   
   For a total of about 250 seconds (or about 4 minutes). This made sense before
   the scheduling replicator because if a replication job had crashed in the
   startup phase enough times it would not be retried anymore. With a scheduling
   replicator, it makes more sense to stop the whole task, and let the scheduling
   replicatgor retry later. `retries_per_request` then becomes something used
   mainly for short intermettent network issues.
   
   The new retry schedule is
   
      `0.25, 0.5, 1, 2, 4`
   
   Or about 8 seconds.
   
   An additional benefit when the job is stopped quicker, the user can find out
   about the problem sooner from the _scheduler/docs and _scheduler/jobs status
   endpoints and can rectify the problem. Otherwise a single request retrying for
   4 minutes would be indicated there as the job is healthy and running.
   
   Fixes #810
   
 
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