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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6440) Support more than 2 NameNodes
Date Fri, 29 May 2015 07:04:18 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14564317#comment-14564317
] 

Hadoop QA commented on HDFS-6440:
---------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  20m 53s | Pre-patch trunk compilation is healthy. |
| {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 24 new
or modified test files. |
| {color:green}+1{color} | javac |   8m  8s | There were no new javac warning messages. |
| {color:green}+1{color} | javadoc |   9m 53s | 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 |   3m  1s | There were no new checkstyle issues. |
| {color:red}-1{color} | whitespace |   4m  2s | The patch has 1  line(s) that end in whitespace.
Use git apply --whitespace=fix. |
| {color:green}+1{color} | install |   1m 43s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 36s | The patch built with eclipse:eclipse.
|
| {color:green}+1{color} | findbugs |   5m 59s | The patch does not introduce any new Findbugs
(version 3.0.0) warnings. |
| {color:green}+1{color} | common tests |  23m 25s | Tests passed in hadoop-common. |
| {color:red}-1{color} | hdfs tests | 168m 33s | Tests failed in hadoop-hdfs. |
| {color:red}-1{color} | hdfs tests |   0m 18s | Tests failed in bkjournal. |
| | | 247m  4s | |
\\
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|| Reason || Tests ||
| Failed unit tests | hadoop.hdfs.TestEncryptedTransfer |
| Timed out tests | org.apache.hadoop.hdfs.server.datanode.TestFsDatasetCache |
| Failed build | bkjournal |
\\
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12736032/hdfs-6440-trunk-v7.patch
|
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / d725dd8 |
| whitespace | https://builds.apache.org/job/PreCommit-HDFS-Build/11157/artifact/patchprocess/whitespace.txt
|
| hadoop-common test log | https://builds.apache.org/job/PreCommit-HDFS-Build/11157/artifact/patchprocess/testrun_hadoop-common.txt
|
| hadoop-hdfs test log | https://builds.apache.org/job/PreCommit-HDFS-Build/11157/artifact/patchprocess/testrun_hadoop-hdfs.txt
|
| bkjournal test log | https://builds.apache.org/job/PreCommit-HDFS-Build/11157/artifact/patchprocess/testrun_bkjournal.txt
|
| Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/11157/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf908.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/11157/console |


This message was automatically generated.

> Support more than 2 NameNodes
> -----------------------------
>
>                 Key: HDFS-6440
>                 URL: https://issues.apache.org/jira/browse/HDFS-6440
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: auto-failover, ha, namenode
>    Affects Versions: 2.4.0
>            Reporter: Jesse Yates
>            Assignee: Jesse Yates
>             Fix For: 3.0.0
>
>         Attachments: Multiple-Standby-NameNodes_V1.pdf, hdfs-6440-cdh-4.5-full.patch,
hdfs-6440-trunk-v1.patch, hdfs-6440-trunk-v1.patch, hdfs-6440-trunk-v3.patch, hdfs-6440-trunk-v4.patch,
hdfs-6440-trunk-v5.patch, hdfs-6440-trunk-v6.patch, hdfs-6440-trunk-v7.patch, hdfs-multiple-snn-trunk-v0.patch
>
>
> Most of the work is already done to support more than 2 NameNodes (one active, one standby).
This would be the last bit to support running multiple _standby_ NameNodes; one of the standbys
should be available for fail-over.
> Mostly, this is a matter of updating how we parse configurations, some complexity around
managing the checkpointing, and updating a whole lot of tests.



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