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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-14216) Improve Configuration XML Parsing Performance
Date Thu, 13 Apr 2017 15:40:42 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-14216?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15967754#comment-15967754
] 

Steve Loughran commented on HADOOP-14216:
-----------------------------------------

Just tracked this down as the likely cause of my S3A test failures. This is pulling in core-site.xml,
which then xincludes auth-keys.xml, which finally references an absolute path, {{file://home/stevel/(secret)/aws-keys.xml}}.
This is failing for me even with the latest patch in. Either transient XIncludes aren't being
picked up or 


{code}

testProviderAbstractClass(org.apache.hadoop.fs.s3a.TestS3AAWSCredentialsProvider)  Time elapsed:
0.005 sec  <<< ERROR!
java.lang.RuntimeException: java.io.IOException: Fetch fail on include with no fallback while
loading 'core-site.xml'
	at org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:2831)
	at org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:2777)
	at org.apache.hadoop.conf.Configuration.loadResources(Configuration.java:2657)
	at org.apache.hadoop.conf.Configuration.getProps(Configuration.java:2545)
	at org.apache.hadoop.conf.Configuration.set(Configuration.java:1238)
	at org.apache.hadoop.conf.Configuration.set(Configuration.java:1210)
	at org.apache.hadoop.fs.s3a.TestS3AAWSCredentialsProvider.expectProviderInstantiationFailure(TestS3AAWSCredentialsProvider.java:224)
	at org.apache.hadoop.fs.s3a.TestS3AAWSCredentialsProvider.testProviderAbstractClass(TestS3AAWSCredentialsProvider.java:60)
{code}

Note also I think the error could be improved. 1. It's in the included file where the problem
appears to lie and 2. we should really know the missing entry. Perhaps a wiki link too: I
had to read the XInclude spec to work out what was going on here before I could go back to
finding the cause

> Improve Configuration XML Parsing Performance
> ---------------------------------------------
>
>                 Key: HADOOP-14216
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14216
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Jonathan Eagles
>            Assignee: Jonathan Eagles
>             Fix For: 2.9.0, 3.0.0-alpha3
>
>         Attachments: HADOOP-14216.1.patch, HADOOP-14216.2-branch-2.patch, HADOOP-14216.2.patch,
HADOOP-14216.addendum.1.patch
>
>
> JIRA is to improve XML parsing performance through reuse and a change in XML parser (STAX)



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