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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (ACCUMULO-4047) TabletBalancer has an implicit requirement for a specific constructor
Date Mon, 02 Nov 2015 16:06:27 GMT

     [ https://issues.apache.org/jira/browse/ACCUMULO-4047?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Josh Elser updated ACCUMULO-4047:
---------------------------------
    Component/s:     (was: ter)

> TabletBalancer has an implicit requirement for a specific constructor
> ---------------------------------------------------------------------
>
>                 Key: ACCUMULO-4047
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4047
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: master
>            Reporter: Josh Elser
>
> TabletBalancers are an extension point designed for non-core-Accumulo devs to implement
balancers for a specific purpose.
> As noticed in ACCUMULO-3356, there is an unwritten requirement that any concrete implementations
of TabletBalancer have a constructor that takes a String object as an argument. This wouldn't
be so bad but it's a silent failure that falls back to the DefaultBalancer (that's why we
haven't noticed ACCUMULO-3356 for ages).
> TabletBalancer already has an init method which could be used. There are lots of other
ways it could be addressed. At a minimum, this should be prominently documented.



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