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From "Josh Elser (JIRA)" <>
Subject [jira] [Commented] (ACCUMULO-4535) HostRegexTableLoadBalancer fails with NullPointerException
Date Thu, 15 Dec 2016 20:24:58 GMT


Josh Elser commented on ACCUMULO-4535:

bq.  Though it would break custom load balancers that are using this function instead of the
other one

This is one of those really hard decisions to make. Personally, I fall on the side of: "if
we can avoid breaking people, please do". But, we are technically under no obligation to maintain
compatibility here. I also find it absurd that we're presenting extension points that aren't
covered by any compatibility guarantees...

> HostRegexTableLoadBalancer fails with NullPointerException
> ----------------------------------------------------------
>                 Key: ACCUMULO-4535
>                 URL:
>             Project: Accumulo
>          Issue Type: Bug
>    Affects Versions: 1.7.2
>            Reporter: Adam J Shook
>            Assignee: Adam J Shook
> Ran into an issue when testing out the {{HostRegexTableLoadBalancer}}.  It fails to start
and throws a {{NullPointerException}} when trying to access the {{poolNameToRegexPattern}}.
 The root cause is the {{init}} function the load balancer overrides is the wrong one that
the Master calls (wrong signature).

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