[jira] [Commented] (ACCUMULO-2739) Create an In-Process MiniAccumuloCluster

["Josh Elser (JIRA)" <ji...@apache.org>]

    [ 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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