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https://issues.apache.org/jira/browse/HBASE-19920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16359248#comment-16359248
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Mike Drob commented on HBASE-19920:
-----------------------------------

Not sure why it couldn't comment...

https://builds.apache.org/job/PreCommit-HBASE-Build/11457 ran against v8

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02:35:47.560                           Adding comment to JIRA
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02:37:11.642 +1 overall
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02:37:11.764 | Vote |       Subsystem |  Runtime   | Comment
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02:37:11.822 |   0  |         reexec  |   0m 12s   | Docker mode activated. 
02:37:11.853 |      |                 |            | Prechecks 
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not available. 
02:37:11.910 |  +1  |      hbaseanti  |   0m  0s   | Patch does not have any 
anti-patterns. 
02:37:11.939 |  +1  |        @author  |   0m  0s   | The patch does not contain 
any @author 
02:37:11.939 |      |                 |            | tags.
02:37:11.967 |  +1  |     test4tests  |   0m  0s   | The patch appears to 
include 1 new or 
02:37:11.967 |      |                 |            | modified test files.
02:37:11.994 |      |                 |            | master Compile Tests 
02:37:12.026 |   0  |         mvndep  |   0m 23s   | Maven dependency ordering 
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02:37:12.061 |  +1  |     mvninstall  |   4m 25s   | master passed 
02:37:12.091 |  +1  |        compile  |   1m  3s   | master passed 
02:37:12.116 |  +1  |     checkstyle  |   1m 39s   | master passed 
02:37:12.145 |  +1  |     shadedjars  |   6m 21s   | branch has no errors when 
building our 
02:37:12.145 |      |                 |            | shaded downstream 
artifacts.
02:37:12.173 |  +1  |        javadoc  |   0m 48s   | master passed 
02:37:12.197 |      |                 |            | Patch Compile Tests 
02:37:12.221 |   0  |         mvndep  |   0m 14s   | Maven dependency ordering 
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02:37:12.252 |  +1  |     mvninstall  |   4m 21s   | the patch passed 
02:37:12.281 |  +1  |        compile  |   1m  2s   | the patch passed 
02:37:12.307 |  +1  |          javac  |   1m  2s   | the patch passed 
02:37:12.339 |  +1  |     checkstyle  |   1m 37s   | the patch passed 
02:37:12.372 |  +1  |     whitespace  |   0m  0s   | The patch has no 
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02:37:12.401 |  +1  |     shadedjars  |   4m 42s   | patch has no errors when 
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artifacts.
02:37:12.437 |  +1  |    hadoopcheck  |  18m 58s   | Patch does not cause any 
errors with 
02:37:12.437 |      |                 |            | Hadoop 2.6.5 2.7.4 or 
3.0.0.
02:37:12.480 |  +1  |        javadoc  |   0m 50s   | the patch passed 
02:37:12.509 |      |                 |            | Other Tests 
02:37:12.538 |  +1  |           unit  |   3m  4s   | hbase-client in the patch 
passed. 
02:37:12.563 |  +1  |           unit  | 111m 12s   | hbase-server in the patch 
passed. 
02:37:12.593 |  +1  |     asflicense  |   0m 40s   | The patch does not 
generate ASF License 
02:37:12.593 |      |                 |            | warnings.
02:37:12.625 |      |                 | 155m 36s   | 
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02:37:12.626 || Subsystem || Report/Notes ||
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02:37:12.632 | Docker | Client=17.05.0-ce Server=17.05.0-ce 
Image:yetus/hbase:eee3b01 |
02:37:12.637 | JIRA Issue | HBASE-19920 |
02:37:12.642 | JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12909862/HBASE-19920.v8.patch |
02:37:12.647 | Optional Tests |  asflicense  javac  javadoc  unit  findbugs  
shadedjars  hadoopcheck  hbaseanti  checkstyle  compile  |
02:37:12.652 | uname | Linux 3b98d43f13bd 3.13.0-139-generic #188-Ubuntu SMP 
Tue Jan 9 14:43:09 UTC 2018 x86_64 GNU/Linux |
02:37:12.656 | Build tool | maven |
02:37:12.660 | Personality | 
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/component/dev-support/hbase-personality.sh
 |
02:37:12.663 | git revision | master / f1a81618fd |
02:37:12.688 | maven | version: Apache Maven 3.5.2 
(138edd61fd100ec658bfa2d307c43b76940a5d7d; 2017-10-18T07:58:13Z) |
02:37:12.688 | Default Java | 1.8.0_151 |
02:37:12.688 |  Test Results | 
https://builds.apache.org/job/PreCommit-HBASE-Build/11457/testReport/ |
02:37:12.688 | Max. process+thread count | 4404 (vs. ulimit of 10000) |
02:37:12.688 | modules | C: hbase-client hbase-server U: . |
02:37:12.713 | Console output | 
https://builds.apache.org/job/PreCommit-HBASE-Build/11457/console |
02:37:12.713 | Powered by | Apache Yetus 0.7.0   http://yetus.apache.org |
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[~toffer] - we good with this?

> TokenUtil.obtainToken unnecessarily creates a local directory
> -------------------------------------------------------------
>
>                 Key: HBASE-19920
>                 URL: https://issues.apache.org/jira/browse/HBASE-19920
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Rohini Palaniswamy
>            Assignee: Mike Drob
>            Priority: Major
>             Fix For: 2.0
>
>         Attachments: HBASE-19920.patch, HBASE-19920.v2.patch, 
> HBASE-19920.v3.patch, HBASE-19920.v4.patch, HBASE-19920.v5.patch, 
> HBASE-19920.v6.patch, HBASE-19920.v7.patch, HBASE-19920.v8.patch
>
>
> On client code, when one calls TokenUtil.obtainToken it loads ProtobufUtil 
> which in its static block initializes DynamicClassLoader and that creates the 
> directory ${hbase.local.dir}/jars/ and also instantiates a filesystem class 
> to access hbase.dynamic.jars.dir.
> https://github.com/apache/hbase/blob/master/hbase-common/src/main/java/org/apache/hadoop/hbase/util/DynamicClassLoader.java#L109-L127
> Since this is region server specific code, not expecting this to happen when 
> one accesses hbase as a client.



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