Bharat Viswanadham created HDDS-3580:
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             Summary: Retry Cache in OM
                 Key: HDDS-3580
                 URL: https://issues.apache.org/jira/browse/HDDS-3580
             Project: Hadoop Distributed Data Store
          Issue Type: Bug
            Reporter: Bharat Viswanadham
            Assignee: Bharat Viswanadham
         Attachments: Retry Cache in OM.pdf

The failover proxy provider for OM HA retries requests on Network 
Timeout/Connectivity Exception. It can retry the request on the same OM or a 
new OM. If the request has been already processed, the subsequent retry will 
fail with error for non idempotent operations such as createVolume, 
createBucket createKey, renameKey etc. This will cause an application failure, 
unnecessary overhead in processing the operation again, and possibly corruption 
in metadata during failover.

This Jira is to discuss this issue in detail,  and also categorize OM 
operations.



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