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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-2739) Create an In-Process MiniAccumuloCluster
Date Tue, 23 Aug 2016 19:23:20 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-2739?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15433429#comment-15433429
] 

Josh Elser commented on ACCUMULO-2739:
--------------------------------------

Just stumbled across an unexpected issue with this approach working with some HBase code.

When you have Kerberos enabled, you have to be extremely careful about how UGI's are managed.
Suddenly, logging in as a different user could log out the HBase threads. Having separate
processes actually makes this a bit better (and more accurate WRT a standalone instance).

> Create an In-Process MiniAccumuloCluster
> ----------------------------------------
>
>                 Key: ACCUMULO-2739
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2739
>             Project: Accumulo
>          Issue Type: New Feature
>          Components: mini
>            Reporter: Josh Elser
>             Fix For: 1.9.0
>
>
> Two common griefs about MiniAccumuloCluster is that it's slow to start and it is difficult
to debug things running inside of the Master or TabletServer (because they are in separate
processes).
> Running each Accumulo process inside of the parent process would likely increase startup
speed and would make debugging much easier (as you wouldn't have to remote-attach the debugger
anymore).
> Such a MAC would likely also pave the way for easier migration away from MockAccumulo
as both of the above complaints are some of the primary concerns for removing Mock with no
replacemnt.



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