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https://issues.apache.org/jira/browse/HDFS-3862?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14526131#comment-14526131
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Hadoop QA commented on HDFS-3862:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch | 14m 37s | 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 4 new or modified test files. |
| {color:green}+1{color} | javac | 7m 30s | There were no new javac warning
messages. |
| {color:green}+1{color} | javadoc | 9m 37s | 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:red}-1{color} | checkstyle | 2m 22s | The applied patch generated 1
new checkstyle issues (total was 39, now 40). |
| {color:red}-1{color} | whitespace | 0m 1s | The patch has 15 line(s) that
end in whitespace. Use git apply --whitespace=fix. |
| {color:green}+1{color} | install | 1m 36s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse | 0m 32s | The patch built with
eclipse:eclipse. |
| {color:green}+1{color} | findbugs | 5m 22s | The patch does not introduce
any new Findbugs (version 2.0.3) warnings. |
| {color:green}+1{color} | common tests | 22m 46s | Tests passed in
hadoop-common. |
| {color:green}+1{color} | hdfs tests | 166m 38s | Tests passed in hadoop-hdfs.
|
| {color:green}+1{color} | hdfs tests | 3m 56s | Tests passed in bkjournal. |
| | | 236m 2s | |
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|| Subsystem || Report/Notes ||
| Patch URL |
http://issues.apache.org/jira/secure/attachment/12669903/HDFS-3862.003.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / a319771 |
| checkstyle |
https://builds.apache.org/job/PreCommit-HDFS-Build/10763/artifact/patchprocess/diffcheckstylehadoop-common.txt
|
| whitespace |
https://builds.apache.org/job/PreCommit-HDFS-Build/10763/artifact/patchprocess/whitespace.txt
|
| hadoop-common test log |
https://builds.apache.org/job/PreCommit-HDFS-Build/10763/artifact/patchprocess/testrun_hadoop-common.txt
|
| hadoop-hdfs test log |
https://builds.apache.org/job/PreCommit-HDFS-Build/10763/artifact/patchprocess/testrun_hadoop-hdfs.txt
|
| bkjournal test log |
https://builds.apache.org/job/PreCommit-HDFS-Build/10763/artifact/patchprocess/testrun_bkjournal.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-HDFS-Build/10763/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf909.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/10763/console |
This message was automatically generated.
> QJM: don't require a fencer to be configured if shared storage has built-in
> single-writer semantics
> ---------------------------------------------------------------------------------------------------
>
> Key: HDFS-3862
> URL: https://issues.apache.org/jira/browse/HDFS-3862
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha
> Affects Versions: QuorumJournalManager (HDFS-3077)
> Reporter: Todd Lipcon
> Assignee: Yi Liu
> Attachments: HDFS-3862.001.patch, HDFS-3862.002.patch,
> HDFS-3862.003.patch
>
>
> Currently, NN HA requires that the administrator configure a fencing method
> to ensure that only a single NameNode may write to the shared storage at a
> time. Some shared edits storage implementations (like QJM) inherently enforce
> single-writer semantics at the storage level, and thus the user should not be
> forced to specify one.
> We should extend the JournalManager interface so that the HA code can operate
> without a configured fencer if the JM has such built-in fencing.
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