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https://issues.apache.org/jira/browse/ACCUMULO-3267?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14185927#comment-14185927
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Christopher Tubbs commented on ACCUMULO-3267:
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If it's specified as a path, "auto", or "false" (with "true" synonymous with
"auto" for backwards-compatibility) instead of "true" or "false", with "auto"
as the default, it would be easily distinguishable from the default and would
have clearer fallback semantics.
> Insufficient validation for bad configuration
> ---------------------------------------------
>
> Key: ACCUMULO-3267
> URL: https://issues.apache.org/jira/browse/ACCUMULO-3267
> Project: Accumulo
> Issue Type: Improvement
> Affects Versions: 1.6.0
> Reporter: Christopher Tubbs
>
> A user reported to me that they had tried using the 512MB native-standalone
> example configuration with Hadoop 1, and without compiling the native
> libraries.
> They saw two errors:
> # There was an {{IllegalArgumentException}} coming from
> {{TabletServerResearceManager}}'s constructor about trying to allocate more
> memory than available to the JVM.
> # init failed because it could not found the core-site.xml file (because the
> default examples assume Hadoop 2).
> In both cases, the error messages were misleading and/or insufficient. The
> actual problem in the first case was that the user specified to use native
> maps in the configuration, but those were not loadable. This is a
> configuration error, and we can/should validate it sooner, with a more
> obvious error message.
> In the second case, the problem was because we could not auto-discover the
> location for the Hadoop configuration directory in the accumulo-env.sh script
> so it can be added to the classpath. The error message occurs later, when
> we're unable to read the file, but we could fail sooner, perhaps in the
> {{bin/accumulo}}, when we can't find everything we require from the
> environment. I think a proper long-term fix for this is to stop making
> assumptions about directory layouts, and explicitly ask for the bootstrap
> classpath in the environment, but a better warning message is a good
> short-term fix.
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