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https://issues.apache.org/jira/browse/HADOOP-11211?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14243967#comment-14243967
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Hudson commented on HADOOP-11211:
---------------------------------
FAILURE: Integrated in Hadoop-Yarn-trunk-Java8 #38 (See
[https://builds.apache.org/job/Hadoop-Yarn-trunk-Java8/38/])
HADOOP-11211. mapreduce.job.classloader.system.classes semantics should be
order-independent. (Yitong Zhou via gera) (gera: rev
0bcea111e5daa9a4315346cf6919a4cfc8d90e0d)
*
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/ApplicationClassLoader.java
*
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/resources/mapred-default.xml
*
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/TestApplicationClassLoader.java
* hadoop-common-project/hadoop-common/CHANGES.txt
> mapreduce.job.classloader.system.classes semantics should be order-independent
> ------------------------------------------------------------------------------
>
> Key: HADOOP-11211
> URL: https://issues.apache.org/jira/browse/HADOOP-11211
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: hudson
> Reporter: Yitong Zhou
> Assignee: Yitong Zhou
> Fix For: 2.7.0
>
> Attachments: HADOOP-11211.003.patch, HADOOP-11211.patch
>
>
> If we want to include package foo.bar.* but exclude all sub packages named
> foo.bar.tar.* in system classes, configuring
> "mapreduce.job.classloader.system.classes=foo.bar.,-foo.bar.tar." won't work.
> foo.bar.tar will still be pulled in. But if we change the order:
> "mapreduce.job.classloader.system.classes=-foo.bar.tar.,foo.bar.", then it
> will work.
> This bug is due to the implementation of ApplicationClassLoaser#isSystemClass
> in hadoop-common, where we simply return the matching result immediately when
> the class name hits the first match (either positive or negative).
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