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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Created] (PHOENIX-4130) Avoid server retries for mutable indexes
Date Sat, 26 Aug 2017 00:00:00 GMT
Lars Hofhansl created PHOENIX-4130:
--------------------------------------

             Summary: Avoid server retries for mutable indexes
                 Key: PHOENIX-4130
                 URL: https://issues.apache.org/jira/browse/PHOENIX-4130
             Project: Phoenix
          Issue Type: Improvement
            Reporter: Lars Hofhansl


Had some discussions with [~jamestaylor], [~samarthjain], and [~vincentpoon], during which
I suggested that we can possibly eliminate retry loops happening at the server that cause
the handler threads to be stuck potentially for quite a while (at least multiple seconds to
ride over common scenarios like splits).
Instead we can do the retries at the Phoenix client that.

So:
# The index updates are not retried on the server. (retries = 0)
# A failed index update would set the failed index timestamp but leave the index enabled.
# Now the handler thread is done, it throws an appropriate exception back to the client.
# The Phoenix client can now retry. When those retries fail the index is disabled (if the
policy dictates that) and throw the exception back to its caller.

So no more waiting is needed on the server, handler threads are freed immediately.




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