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https://issues.apache.org/jira/browse/HDFS-16728?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17578561#comment-17578561
 ] 

ASF GitHub Bot commented on HDFS-16728:
---------------------------------------

hadoop-yetus commented on PR #4734:
URL: https://github.com/apache/hadoop/pull/4734#issuecomment-1212228190

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
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   |||| _ trunk Compile Tests _ |
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   |||| _ Other Tests _ |
   | +1 :green_heart: |  unit  |  22m 17s |  |  hadoop-hdfs-rbf in the patch 
passed.  |
   | +1 :green_heart: |  asflicense  |   0m 52s |  |  The patch does not 
generate ASF License warnings.  |
   |  |   | 120m 33s |  |  |
   
   
   | Subsystem | Report/Notes |
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   | Docker | ClientAPI=1.41 ServerAPI=1.41 base: 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4734/1/artifact/out/Dockerfile
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   | GITHUB PR | https://github.com/apache/hadoop/pull/4734 |
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https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4734/1/testReport/ |
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   | modules | C: hadoop-hdfs-project/hadoop-hdfs-rbf U: 
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https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4734/1/console |
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   | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
   
   
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> RBF throw IndexOutOfBoundsException with disableNameServices
> ------------------------------------------------------------
>
>                 Key: HDFS-16728
>                 URL: https://issues.apache.org/jira/browse/HDFS-16728
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: ZanderXu
>            Assignee: ZanderXu
>            Priority: Major
>              Labels: pull-request-available
>
> RBF will throw an IndexOutOfBoundsException when the namespace is disabled.
> Suppose we have a mount point /a/b -> ns0 -> /a/b and we disabled the ns0.  
> RBF will throw IndexOutOfBoundsException during handling requests with path 
> starting with /a/b.
> {code:java}
> java.lang.IndexOutOfBoundsException: Index: 0, Size: 0    at 
> java.util.ArrayList.rangeCheck(ArrayList.java:657)
>     at java.util.ArrayList.get(ArrayList.java:433)
>     at 
> org.apache.hadoop.hdfs.server.federation.router.RouterClientProtocol.mkdirs(RouterClientProtocol.java:756)
>     at 
> org.apache.hadoop.hdfs.server.federation.router.RouterRpcServer.mkdirs(RouterRpcServer.java:980)
>  {code}



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