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Hadoop QA commented on HDFS-8826: --------------------------------- \\ \\ | (x) *{color:red}-1 overall{color}* | \\ \\ || Vote || Subsystem || Runtime || Comment || | {color:blue}0{color} | pre-patch | 22m 4s | 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 | 9m 49s | There were no new javac warning messages. | | {color:green}+1{color} | javadoc | 12m 33s | There were no new javadoc warning messages. | | {color:green}+1{color} | release audit | 0m 39s | The applied patch does not increase the total number of release audit warnings. | | {color:red}-1{color} | checkstyle | 3m 37s | The applied patch generated 6 new checkstyle issues (total was 99, now 94). | | {color:red}-1{color} | whitespace | 0m 1s | The patch has 8 line(s) that end in whitespace. Use git apply --whitespace=fix. | | {color:green}+1{color} | install | 1m 45s | mvn install still works. | | {color:green}+1{color} | eclipse:eclipse | 0m 37s | The patch built with eclipse:eclipse. | | {color:green}+1{color} | findbugs | 5m 40s | The patch does not introduce any new Findbugs (version 3.0.0) warnings. | | {color:red}-1{color} | common tests | 24m 54s | Tests failed in hadoop-common. | | {color:red}-1{color} | hdfs tests | 176m 3s | Tests failed in hadoop-hdfs. | | | | 257m 46s | | \\ \\ || Reason || Tests || | Failed unit tests | hadoop.net.TestNetUtils | | | hadoop.ipc.TestDecayRpcScheduler | | | hadoop.ha.TestZKFailoverController | | | hadoop.fs.TestLocalFsFCStatistics | | | hadoop.ipc.TestIPC | | | hadoop.hdfs.TestAppendSnapshotTruncate | | | hadoop.hdfs.TestReplaceDatanodeOnFailure | | Timed out tests | org.apache.hadoop.cli.TestHDFSCLI | \\ \\ || Subsystem || Report/Notes || | Patch URL | http://issues.apache.org/jira/secure/attachment/12750732/h8826_20150816.patch | | Optional Tests | javadoc javac unit findbugs checkstyle | | git revision | trunk / 13604bd | | checkstyle | https://builds.apache.org/job/PreCommit-HDFS-Build/12005/artifact/patchprocess/diffcheckstylehadoop-hdfs.txt | | whitespace | https://builds.apache.org/job/PreCommit-HDFS-Build/12005/artifact/patchprocess/whitespace.txt | | hadoop-common test log | https://builds.apache.org/job/PreCommit-HDFS-Build/12005/artifact/patchprocess/testrun_hadoop-common.txt | | hadoop-hdfs test log | https://builds.apache.org/job/PreCommit-HDFS-Build/12005/artifact/patchprocess/testrun_hadoop-hdfs.txt | | Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/12005/testReport/ | | Java | 1.7.0_55 | | uname | Linux asf904.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/12005/console | This message was automatically generated. > Balancer may not move blocks efficiently in some cases > ------------------------------------------------------ > > Key: HDFS-8826 > URL: https://issues.apache.org/jira/browse/HDFS-8826 > Project: Hadoop HDFS > Issue Type: Sub-task > Components: balancer & mover > Reporter: Tsz Wo Nicholas Sze > Assignee: Tsz Wo Nicholas Sze > Attachments: h8826_20150811.patch, h8826_20150816.patch > > > Balancer is inefficient in the following case: > || Datanode || Utilization || Rack || > | D1 | 95% | A | > | D2 | 30% | B | > | D3, D4, D5 | 0% | B | > The average utilization is 25% so that D2 is within 10% threshold. However, > Balancer currently will first move blocks from D2 to D3, D4 and D5 since they > are under the same rack. Then, it will move blocks from D1. -- This message was sent by Atlassian JIRA (v6.3.4#6332)