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https://issues.apache.org/jira/browse/HADOOP-14387?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16001049#comment-16001049
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Jonathan Eagles commented on HADOOP-14387:
------------------------------------------
[[email protected]], Could use some help reproducing the case you are seeing.
Some background. The original patch tries to maintain the policy that all
default resources are optional by checking the reader.
{code:title=Configuration#loadResource}
...
if (reader == null) {
if (quiet) {
return null;
}
throw new RuntimeException(resource + " not found");
}
...
{code}
Where I am having confusion is the stack trace provided doesn't match the
description of how to reproduce. I verified the bug in the stack trace is
fixed. I have verified in my setup that core-site.xml is optional using the
below test case. Can you help me understand how to reproduce the case you are
having?
{code:title=FailConf.java}
import org.apache.hadoop.conf.Configuration;
public class FailConf {
public static void main(String[] args) {
Configuration conf = new Configuration();
System.out.println(conf.get("hadoop.common.configuration.version"));
System.out.println(conf.toString());
}
}
{code}
{code:title=bash}
# build hadoop 2.9
$ mvn clean install package -Pdist -Dtar -DskipTests -Dmaven.javadoc.skip
# build FailConf.java
$ javac -cp
./:./hadoop-client/target/hadoop-client-2.9.0-SNAPSHOT/share/hadoop/client/lib/*
FailConf.java
# run FailConf with core-default.xml and no core-site.xml
$ java -cp
./:./hadoop-client/target/hadoop-client-2.9.0-SNAPSHOT/share/hadoop/client/lib/*
FailConf
# Success
# 0.23.0
# Configuration: core-default.xml, core-site.xml
{code}
> new Configuration().get() fails if core-site.xml isn't on the classpath
> -----------------------------------------------------------------------
>
> Key: HADOOP-14387
> URL: https://issues.apache.org/jira/browse/HADOOP-14387
> Project: Hadoop Common
> Issue Type: Bug
> Components: conf
> Affects Versions: 3.0.0-alpha3
> Environment: test run in downstream project with no core-site in
> test/resources
> Reporter: Steve Loughran
> Assignee: Jonathan Eagles
> Priority: Blocker
> Attachments: HADOOP-14387.1.patch
>
>
> If you try to create a config via {{new Configuration()}} and there isn't a
> {{core-site.xml}} on the CP, you get a stack trace. Previously it'd just skip
> the failure to load.
> This is a regression which breaks downstream apps that don't need a core-site
> to run, but do want to load core-default &c
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