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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-3273) majc holding up tablet unloads?
Date Mon, 03 Nov 2014 17:19:33 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-3273?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14194749#comment-14194749
] 

Josh Elser commented on ACCUMULO-3273:
--------------------------------------

bq. It doesn't interrupt the thread, it just sets a volatile boolean, which is checked frequently
during the compaction.

Gotcha, thanks for saving me a trip to the code.

bq. Also, I could use ideas on how best to debug the situation.

Could you potentially take an RFIle on disk and mock up a DFSClient that returns you the bytes
from that file? That might let you be able to simulate pauses in reading from that file for
the purposes of fixing the overall bug. I don't have any good ideas at the moment on how to
mitigate this in the wild though.

> majc holding up tablet unloads?
> -------------------------------
>
>                 Key: ACCUMULO-3273
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3273
>             Project: Accumulo
>          Issue Type: Bug
>          Components: tserver
>    Affects Versions: 1.6.0, 1.6.1
>            Reporter: Eric Newton
>            Assignee: Eric Newton
>            Priority: Minor
>             Fix For: 1.6.2, 1.7.0
>
>
> While testing ACCUMULO-3263 on a large cluster, the table being randomized would not
go offline.  Each of these servers was performing a major compaction of the tablets to be
offlined.  I thought that taking a tablet offline would abort the majc.  Need an IT to verify
this.



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