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https://issues.apache.org/jira/browse/HDFS-2430?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13160535#comment-13160535
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Eli Collins commented on HDFS-2430:
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bq. It only throws an RTE if the configured number of redundant resources is
less than the configured minimum number of redundant resources. i.e. it throws
only in the case of misconfiguration. If indeed the number of configured
redundant resources is greater than the minimum, but the number of available
redundant resources is below the minimum, the method will return false. Does
that seem reasonable?
Ah, I think it would be more clear if the static (configuration) one-time check
was separated from the dynamic check (eg so you don't have to check all callers
to reason about the method) but I don't feel strongly. If you keep the current
behavior please add a throws clause to the javadoc and add a comment per your
above explanation. If you want to address it feel free to do so in a follow on
jira. +1 to the latest patch.
> The number of failed or low-resource volumes the NN can tolerate should be
> configurable
> ---------------------------------------------------------------------------------------
>
> Key: HDFS-2430
> URL: https://issues.apache.org/jira/browse/HDFS-2430
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: name-node
> Affects Versions: 0.24.0
> Reporter: Aaron T. Myers
> Assignee: Aaron T. Myers
> Attachments: HDFS-2430.patch, HDFS-2430.patch, HDFS-2430.patch,
> HDFS-2430.patch
>
>
> Currently the number of failed or low-resource volumes the NN can tolerate is
> effectively hard-coded at 1. It would be nice if this were configurable.
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