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Date: Wed, 26 Aug 2015 03:59:46 +0000 (UTC)
From: "Hadoop QA (JIRA)" <jira@apache.org>
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Message-ID: <JIRA.12858386.1440445490000.166638.1440561586032@Atlassian.JIRA>
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Subject: [jira] [Commented] (HDFS-8950) NameNode refresh doesn't remove
 DataNodes
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    [ https://issues.apache.org/jira/browse/HDFS-8950?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14712448#comment-14712448 ] 

Hadoop QA commented on HDFS-8950:
---------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | pre-patch |  17m 43s | Pre-patch trunk has 4 extant Findbugs (version 3.0.0) warnings. |
| {color:green}+1{color} | @author |   0m  0s | The patch does not contain any @author tags. |
| {color:green}+1{color} | tests included |   0m  0s | The patch appears to include 1 new or modified test files. |
| {color:green}+1{color} | javac |   7m 51s | There were no new javac warning messages. |
| {color:green}+1{color} | javadoc |  10m 13s | There were no new javadoc warning messages. |
| {color:green}+1{color} | release audit |   0m 23s | The applied patch does not increase the total number of release audit warnings. |
| {color:green}+1{color} | checkstyle |   1m 21s | There were no new checkstyle issues. |
| {color:green}+1{color} | whitespace |   0m  0s | The patch has no lines that end in whitespace. |
| {color:green}+1{color} | install |   1m 28s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 32s | The patch built with eclipse:eclipse. |
| {color:green}+1{color} | findbugs |   2m 31s | The patch does not introduce any new Findbugs (version 3.0.0) warnings. |
| {color:green}+1{color} | native |   3m  8s | Pre-build of native portion |
| {color:red}-1{color} | hdfs tests | 166m 42s | Tests failed in hadoop-hdfs. |
| | | 211m 55s | |
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|| Reason || Tests ||
| Failed unit tests | hadoop.hdfs.shortcircuit.TestShortCircuitCache |
|   | hadoop.hdfs.TestDecommission |
|   | hadoop.hdfs.server.namenode.TestAuditLogs |
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12752359/HDFS-8950.002.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / a4d9acc |
| Pre-patch Findbugs warnings | https://builds.apache.org/job/PreCommit-HDFS-Build/12128/artifact/patchprocess/trunkFindbugsWarningshadoop-hdfs.html |
| hadoop-hdfs test log | https://builds.apache.org/job/PreCommit-HDFS-Build/12128/artifact/patchprocess/testrun_hadoop-hdfs.txt |
| Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/12128/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf900.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP PREEMPT Wed Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/12128/console |


This message was automatically generated.

> NameNode refresh doesn't remove DataNodes
> -----------------------------------------
>
>                 Key: HDFS-8950
>                 URL: https://issues.apache.org/jira/browse/HDFS-8950
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode, namenode
>    Affects Versions: 2.6.0
>            Reporter: Daniel Templeton
>            Assignee: Daniel Templeton
>             Fix For: 2.8.0
>
>         Attachments: HDFS-8950.001.patch, HDFS-8950.002.patch
>
>
> If you remove a DN from NN's allowed host list (HDFS was HA) and then do NN refresh, it doesn't remove it actually and the NN UI keeps showing that node. It may try to allocate some blocks to that DN as well during an MR job.  This issue is independent from DN decommission.
> To reproduce:
> 1. Add a DN to dfs_hosts_allow
> 2. Refresh NN
> 3. Start DN. Now NN starts seeing DN.
> 4. Stop DN
> 5. Remove DN from dfs_hosts_allow
> 6. Refresh NN -> NN is still reporting DN as being used by HDFS.
> This is different from decom because there DN is added to exclude list in addition to being removed from allowed list, and in that case everything works correctly.


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