[
https://issues.apache.org/jira/browse/HADOOP-7313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13036632#comment-13036632
]
E. Sammer commented on HADOOP-7313:
-----------------------------------
Many places in the code base use the form of Configuration#get*() that accepts
defaults. This makes life much easier for developers in that we can be sure we
don't get a NullPointerException on return, but it creates a situation where
*-default.xml does not match the defaults supplied in code. This presents
potentially odd behavior. Ideally, an option missing from the proper
*-default.xml file is a build / release error rather than something that
silently results in an undocumented value.
Ari Rabkin did some research into this[1] and identified some of these
inconsistencies.
[1] http://www.cs.berkeley.edu/~asrabkin/hadoop_opts/cdh3u0-options.html (While
this says cdh3u0, I believe it still applies to Apache Hadoop trunk).
> Remove all framework use of Configuration default args
> ------------------------------------------------------
>
> Key: HADOOP-7313
> URL: https://issues.apache.org/jira/browse/HADOOP-7313
> Project: Hadoop Common
> Issue Type: Improvement
> Components: conf
> Affects Versions: 0.21.0
> Reporter: E. Sammer
>
> The Hadoop code base should not use the form of Configuration#get*() that
> accepts a default.
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
