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From "Josh Elser (JIRA)" <>
Subject [jira] [Commented] (ACCUMULO-3273) majc holding up tablet unloads?
Date Mon, 03 Nov 2014 16:46:33 GMT


Josh Elser commented on ACCUMULO-3273:

{{DiskChecker}} in hadoop-common is the class that we're interested in here. This class is
ultimately used (invoked by a thread inside the DataNode) to make sure that the configured
volumes exist and have read/write permissions by the process. They do not appear to do any
sort of check to make sure the volume hasn't flipped into R/O -- sounds like a possible HDFS
ticket to file?

> majc holding up tablet unloads?
> -------------------------------
>                 Key: ACCUMULO-3273
>                 URL:
>             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

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