Josh Elser created ACCUMULO-4047:
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Summary: 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: ter, 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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