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Posted to common-issues@hadoop.apache.org by "Jason Lowe (JIRA)" <ji...@apache.org> on 2018/12/14 22:43:00 UTC
[jira] [Commented] (HADOOP-16007) Order of property settings is
incorrect when includes are processed
[ https://issues.apache.org/jira/browse/HADOOP-16007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16721844#comment-16721844 ]
Jason Lowe commented on HADOOP-16007:
-------------------------------------
I tracked this behavior change down to HADOOP-15554. I believe the problem stems from Parser#handleInclude parsing the included sub-resource directly into the Configuration {{properties}} member which bypasses the ordering of properties returned by the Parser#parse method.
> Order of property settings is incorrect when includes are processed
> -------------------------------------------------------------------
>
> Key: HADOOP-16007
> URL: https://issues.apache.org/jira/browse/HADOOP-16007
> Project: Hadoop Common
> Issue Type: Bug
> Components: conf
> Affects Versions: 3.2.0, 3.1.1, 3.0.4
> Reporter: Jason Lowe
> Priority: Blocker
>
> If a configuration file contains a setting for a property then later includes another file that also sets that property to a different value then the property will be parsed incorrectly. For example, consider the following configuration file:
> {noformat}
> <configuration xmlns:xi="http://www.w3.org/2001/XInclude">
> <property>
> <name>myprop</name>
> <value>val1</value>
> </property>
> <xi:include href="/some/other/file.xml"/>
> </configuration>
> {noformat}
> with the contents of /some/other/file.xml as:
> {noformat}
> <property>
> <name>myprop</name>
> <value>val2</value>
> </property>
> {noformat}
> Parsing this configuration should result in myprop=val2, but it actually results in myprop=val1.
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