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Hadoop QA commented on HDFS-8873: --------------------------------- \\ \\ | (x) *{color:red}-1 overall{color}* | \\ \\ || Vote || Subsystem || Runtime || Comment || | {color:blue}0{color} | pre-patch | 17m 46s | 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 | 8m 6s | There were no new javac warning messages. | | {color:green}+1{color} | javadoc | 10m 25s | 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 | 1m 22s | The applied patch generated 20 new checkstyle issues (total was 442, now 441). | | {color:red}-1{color} | whitespace | 0m 7s | The patch has 1 line(s) that end in whitespace. Use git apply --whitespace=fix. | | {color:green}+1{color} | install | 1m 27s | mvn install still works. | | {color:green}+1{color} | eclipse:eclipse | 0m 33s | The patch built with eclipse:eclipse. | | {color:green}+1{color} | findbugs | 2m 34s | The patch does not introduce any new Findbugs (version 3.0.0) warnings. | | {color:green}+1{color} | native | 3m 18s | Pre-build of native portion | | {color:red}-1{color} | hdfs tests | 73m 1s | Tests failed in hadoop-hdfs. | | | | 119m 6s | | \\ \\ || Reason || Tests || | Failed unit tests | hadoop.hdfs.web.TestWebHDFSOAuth2 | | Timed out tests | org.apache.hadoop.hdfs.TestDFSFinalize | \\ \\ || Subsystem || Report/Notes || | Patch URL | http://issues.apache.org/jira/secure/attachment/12755474/HDFS-8873.001.patch | | Optional Tests | javadoc javac unit findbugs checkstyle | | git revision | trunk / ea4bb27 | | checkstyle | https://builds.apache.org/job/PreCommit-HDFS-Build/12403/artifact/patchprocess/diffcheckstylehadoop-hdfs.txt | | whitespace | https://builds.apache.org/job/PreCommit-HDFS-Build/12403/artifact/patchprocess/whitespace.txt | | hadoop-hdfs test log | https://builds.apache.org/job/PreCommit-HDFS-Build/12403/artifact/patchprocess/testrun_hadoop-hdfs.txt | | Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/12403/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/12403/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 > > > 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) -- This message was sent by Atlassian JIRA (v6.3.4#6332)