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https://issues.apache.org/jira/browse/HADOOP-11211?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gera Shegalov updated HADOOP-11211:
-----------------------------------
Resolution: Fixed
Status: Resolved (was: Patch Available)
Committed to trunk and branch-2. Thanks [~timyitong] for contribution,
[~sjlee0] and [~kamrul] for helping review the patch.
> 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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