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Hadoop QA commented on HDFS-9198: --------------------------------- \\ \\ | (x) *{color:red}-1 overall{color}* | \\ \\ || Vote || Subsystem || Runtime || Comment || | {color:blue}0{color} | pre-patch | 18m 6s | 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 3 new or modified test files. | | {color:green}+1{color} | javac | 8m 4s | There were no new javac warning messages. | | {color:green}+1{color} | javadoc | 10m 22s | There were no new javadoc warning messages. | | {color:red}-1{color} | release audit | 0m 15s | The applied patch generated 1 release audit warnings. | | {color:red}-1{color} | checkstyle | 1m 25s | The applied patch generated 6 new checkstyle issues (total was 424, now 425). | | {color:green}+1{color} | whitespace | 0m 6s | The patch has no lines that end in whitespace. | | {color:green}+1{color} | install | 1m 31s | mvn install still works. | | {color:green}+1{color} | eclipse:eclipse | 0m 34s | The patch built with eclipse:eclipse. | | {color:red}-1{color} | findbugs | 2m 33s | The patch appears to introduce 1 new Findbugs (version 3.0.0) warnings. | | {color:green}+1{color} | native | 3m 16s | Pre-build of native portion | | {color:red}-1{color} | hdfs tests | 200m 1s | Tests failed in hadoop-hdfs. | | | | 246m 16s | | \\ \\ || Reason || Tests || | FindBugs | module:hadoop-hdfs | | Failed unit tests | hadoop.hdfs.web.TestWebHdfsTimeouts | | | hadoop.hdfs.security.TestDelegationTokenForProxyUser | | | hadoop.hdfs.TestParallelRead | | | hadoop.hdfs.server.namenode.TestDeadDatanode | | | hadoop.hdfs.web.TestWebHdfsContentLength | | | hadoop.hdfs.server.blockmanagement.TestPendingReplication | | | hadoop.hdfs.server.datanode.TestIncrementalBrVariations | \\ \\ || Subsystem || Report/Notes || | Patch URL | http://issues.apache.org/jira/secure/attachment/12765032/HDFS-9198-trunk.patch | | Optional Tests | javadoc javac unit findbugs checkstyle | | git revision | trunk / b925cf1 | | Release Audit | https://builds.apache.org/job/PreCommit-HDFS-Build/12794/artifact/patchprocess/patchReleaseAuditProblems.txt | | checkstyle | https://builds.apache.org/job/PreCommit-HDFS-Build/12794/artifact/patchprocess/diffcheckstylehadoop-hdfs.txt | | Findbugs warnings | https://builds.apache.org/job/PreCommit-HDFS-Build/12794/artifact/patchprocess/newPatchFindbugsWarningshadoop-hdfs.html | | hadoop-hdfs test log | https://builds.apache.org/job/PreCommit-HDFS-Build/12794/artifact/patchprocess/testrun_hadoop-hdfs.txt | | Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/12794/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/12794/console | This message was automatically generated. > Coalesce IBR processing in the NN > --------------------------------- > > Key: HDFS-9198 > URL: https://issues.apache.org/jira/browse/HDFS-9198 > Project: Hadoop HDFS > Issue Type: Improvement > Components: namenode > Affects Versions: 2.0.0-alpha > Reporter: Daryn Sharp > Assignee: Daryn Sharp > Attachments: HDFS-9198-branch2.patch, HDFS-9198-trunk.patch > > > IBRs from thousands of DNs under load will degrade NN performance due to > excessive write-lock contention from multiple IPC handler threads. The IBR > processing is quick, so the lock contention may be reduced by coalescing > multiple IBRs into a single write-lock transaction. The handlers will also > be freed up faster for other operations. -- This message was sent by Atlassian JIRA (v6.3.4#6332)