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From "Chen Liang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-14016) ObserverReadProxyProvider can never enable observer read except in tests
Date Mon, 22 Oct 2018 19:53:00 GMT
Chen Liang created HDFS-14016:
---------------------------------

             Summary: ObserverReadProxyProvider can never enable observer read except in tests
                 Key: HDFS-14016
                 URL: https://issues.apache.org/jira/browse/HDFS-14016
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: Chen Liang
            Assignee: Chen Liang


Currently in {{ObserverReadProxyProvider#invoke}}, only when {{observerReadEnabled &&
isRead(method)}} is true, the code will check whether to talk to Observer. Otherwise always
talk to active. The issue here is that currently it can only be set through {{setObserverReadEnabled}},
which is used by tests only. So observer read is always disabled in deployment and no way
to enable it. We may want to either expose a configuration key, or hard code it to true so
it can only be changed for testing purpose, or simply remove this variable. This is closely
related to HDFS-13923.



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