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From "Andrew Gaul (JIRA)" <j...@apache.org>
Subject [jira] [Created] (JCLOUDS-460) Add random delay to avoid thundering herd problem
Date Mon, 10 Feb 2014 21:41:20 GMT
Andrew Gaul created JCLOUDS-460:
-----------------------------------

             Summary: Add random delay to avoid thundering herd problem
                 Key: JCLOUDS-460
                 URL: https://issues.apache.org/jira/browse/JCLOUDS-460
             Project: jclouds
          Issue Type: Improvement
          Components: jclouds-blobstore
    Affects Versions: 1.7.1
            Reporter: Andrew Gaul
            Assignee: Andrew Gaul


When issuing many simultaneous requests to Synaptic Atmos I observed:

HTTP/1.1 failed with code 500, error: AtmosError [code=1040, message=The server is busy. Please
try again.]

This is a general problem for private blobstores since a single client can often overwhelm
the server with many requests.  While jclouds retries in many of these situations, it waits
a fixed amount of time between requests, often overwhelming the server again.  Instead it
should insert some jitter, e.g., 0-10% extra delay, to more evenly distribute the retries.



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