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https://issues.apache.org/jira/browse/HDFS-7964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14965419#comment-14965419
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Hadoop QA commented on HDFS-7964:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | pre-patch | 20m 50s | Pre-patch trunk has 1 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 11 new or modified test files. |
| {color:green}+1{color} | javac | 10m 16s | There were no new javac warning
messages. |
| {color:green}+1{color} | javadoc | 11m 40s | There were no new javadoc
warning messages. |
| {color:green}+1{color} | release audit | 0m 25s | The applied patch does
not increase the total number of release audit warnings. |
| {color:red}-1{color} | checkstyle | 2m 2s | The applied patch generated 6
new checkstyle issues (total was 1191, now 1162). |
| {color:green}+1{color} | whitespace | 0m 21s | The patch has no lines that
end in whitespace. |
| {color:green}+1{color} | install | 1m 41s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse | 0m 36s | The patch built with
eclipse:eclipse. |
| {color:green}+1{color} | findbugs | 3m 33s | The patch does not introduce
any new Findbugs (version 3.0.0) warnings. |
| {color:green}+1{color} | native | 3m 29s | Pre-build of native portion |
| {color:red}-1{color} | hdfs tests | 54m 38s | Tests failed in hadoop-hdfs. |
| {color:red}-1{color} | hdfs tests | 0m 16s | Tests failed in bkjournal. |
| | | 110m 1s | |
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|| Reason || Tests ||
| Failed unit tests | hadoop.hdfs.TestParallelUnixDomainRead |
| | hadoop.hdfs.TestWriteReadStripedFile |
| | hadoop.hdfs.TestReplaceDatanodeOnFailure |
| | hadoop.hdfs.TestHDFSFileSystemContract |
| | hadoop.hdfs.server.blockmanagement.TestNodeCount |
| Failed build | bkjournal |
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|| Subsystem || Report/Notes ||
| Patch URL |
http://issues.apache.org/jira/secure/attachment/12767604/HDFS-7964.patch |
| Optional Tests | javac unit findbugs checkstyle javadoc |
| git revision | trunk / 9cb5d35 |
| Pre-patch Findbugs warnings |
https://builds.apache.org/job/PreCommit-HDFS-Build/13082/artifact/patchprocess/trunkFindbugsWarningshadoop-hdfs.html
|
| checkstyle |
https://builds.apache.org/job/PreCommit-HDFS-Build/13082/artifact/patchprocess/diffcheckstylehadoop-hdfs.txt
|
| hadoop-hdfs test log |
https://builds.apache.org/job/PreCommit-HDFS-Build/13082/artifact/patchprocess/testrun_hadoop-hdfs.txt
|
| bkjournal test log |
https://builds.apache.org/job/PreCommit-HDFS-Build/13082/artifact/patchprocess/testrun_bkjournal.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-HDFS-Build/13082/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf901.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/13082/console |
This message was automatically generated.
> Add support for async edit logging
> ----------------------------------
>
> Key: HDFS-7964
> URL: https://issues.apache.org/jira/browse/HDFS-7964
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Affects Versions: 2.0.2-alpha
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Attachments: HDFS-7964.patch, HDFS-7964.patch, HDFS-7964.patch
>
>
> Edit logging is a major source of contention within the NN. LogEdit is
> called within the namespace write log, while logSync is called outside of the
> lock to allow greater concurrency. The handler thread remains busy until
> logSync returns to provide the client with a durability guarantee for the
> response.
> Write heavy RPC load and/or slow IO causes handlers to stall in logSync.
> Although the write lock is not held, readers are limited/starved and the call
> queue fills. Combining an edit log thread with postponed RPC responses from
> HADOOP-10300 will provide the same durability guarantee but immediately free
> up the handlers.
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