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https://issues.apache.org/jira/browse/HDFS-8873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14744129#comment-14744129
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Hadoop QA commented on HDFS-8873:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch | 17m 44s | 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 1 new or modified test files. |
| {color:green}+1{color} | javac | 7m 55s | There were no new javac warning
messages. |
| {color:green}+1{color} | javadoc | 10m 7s | There were no new javadoc
warning messages. |
| {color:red}-1{color} | release audit | 0m 19s | The applied patch generated
1 release audit warnings. |
| {color:red}-1{color} | checkstyle | 1m 21s | The applied patch generated 7
new checkstyle issues (total was 442, now 425). |
| {color:red}-1{color} | whitespace | 0m 6s | The patch has 1 line(s) that
end in whitespace. Use git apply --whitespace=fix. |
| {color:green}+1{color} | install | 1m 28s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse | 0m 33s | The patch built with
eclipse:eclipse. |
| {color:red}-1{color} | findbugs | 2m 34s | The patch appears to introduce 1
new Findbugs (version 3.0.0) warnings. |
| {color:green}+1{color} | native | 3m 11s | Pre-build of native portion |
| {color:red}-1{color} | hdfs tests | 171m 51s | Tests failed in hadoop-hdfs. |
| | | 217m 14s | |
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|| Reason || Tests ||
| FindBugs | module:hadoop-hdfs |
| Failed unit tests |
hadoop.hdfs.server.datanode.fsdataset.impl.TestLazyPersistReplicaPlacement |
| | hadoop.hdfs.server.datanode.fsdataset.impl.TestLazyWriter |
| | hadoop.hdfs.server.datanode.fsdataset.impl.TestLazyPersistLockedMemory |
| | hadoop.tools.TestJMXGet |
| Timed out tests |
org.apache.hadoop.hdfs.server.namenode.ha.TestRetryCacheWithHA |
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|| Subsystem || Report/Notes ||
| Patch URL |
http://issues.apache.org/jira/secure/attachment/12755763/HDFS-8873.002.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 6955771 |
| Release Audit |
https://builds.apache.org/job/PreCommit-HDFS-Build/12428/artifact/patchprocess/patchReleaseAuditProblems.txt
|
| checkstyle |
https://builds.apache.org/job/PreCommit-HDFS-Build/12428/artifact/patchprocess/diffcheckstylehadoop-hdfs.txt
|
| whitespace |
https://builds.apache.org/job/PreCommit-HDFS-Build/12428/artifact/patchprocess/whitespace.txt
|
| Findbugs warnings |
https://builds.apache.org/job/PreCommit-HDFS-Build/12428/artifact/patchprocess/newPatchFindbugsWarningshadoop-hdfs.html
|
| hadoop-hdfs test log |
https://builds.apache.org/job/PreCommit-HDFS-Build/12428/artifact/patchprocess/testrun_hadoop-hdfs.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-HDFS-Build/12428/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf907.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/12428/console |
This message was automatically generated.
> throttle directoryScanner
> -------------------------
>
> Key: HDFS-8873
> URL: https://issues.apache.org/jira/browse/HDFS-8873
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Affects Versions: 2.7.1
> Reporter: Nathan Roberts
> Assignee: Daniel Templeton
> Attachments: HDFS-8873.001.patch, HDFS-8873.002.patch
>
>
> The new 2-level directory layout can make directory scans expensive in terms
> of disk seeks (see HDFS-8791) for details.
> It would be good if the directoryScanner() had a configurable duty cycle that
> would reduce its impact on disk performance (much like the approach in
> HDFS-8617).
> Without such a throttle, disks can go 100% busy for many minutes at a time
> (assuming the common case of all inodes in cache but no directory blocks
> cached, 64K seeks are required for full directory listing which translates to
> 655 seconds)
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