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Hadoop QA commented on HBASE-15716: ----------------------------------- | (x) *{color:red}-1 overall{color}* | \\ \\ || Vote || Subsystem || Runtime || Comment || | {color:green}+1{color} | {color:green} hbaseanti {color} | {color:green} 0m 0s {color} | {color:green} Patch does not have any anti-patterns. {color} | | {color:green}+1{color} | {color:green} @author {color} | {color:green} 0m 0s {color} | {color:green} The patch does not contain any @author tags. {color} | | {color:green}+1{color} | {color:green} test4tests {color} | {color:green} 0m 0s {color} | {color:green} The patch appears to include 1 new or modified test files. {color} | | {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 16s {color} | {color:blue} Maven dependency ordering for branch {color} | | {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 2m 23s {color} | {color:green} branch-1 passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m 7s {color} | {color:green} branch-1 passed with JDK v1.8.0 {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 58s {color} | {color:green} branch-1 passed with JDK v1.7.0_80 {color} | | {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 52s {color} | {color:green} branch-1 passed {color} | | {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 30s {color} | {color:green} branch-1 passed {color} | | {color:red}-1{color} | {color:red} findbugs {color} | {color:red} 2m 12s {color} | {color:red} hbase-server in branch-1 has 1 extant Findbugs warnings. {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 58s {color} | {color:green} branch-1 passed with JDK v1.8.0 {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 0s {color} | {color:green} branch-1 passed with JDK v1.7.0_80 {color} | | {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 12s {color} | {color:blue} Maven dependency ordering for patch {color} | | {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 1m 8s {color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m 7s {color} | {color:green} the patch passed with JDK v1.8.0 {color} | | {color:green}+1{color} | {color:green} javac {color} | {color:green} 1m 7s {color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 56s {color} | {color:green} the patch passed with JDK v1.7.0_80 {color} | | {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 56s {color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 54s {color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 28s {color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m 0s {color} | {color:green} Patch has no whitespace issues. {color} | | {color:green}+1{color} | {color:green} hadoopcheck {color} | {color:green} 17m 45s {color} | {color:green} Patch does not cause any errors with Hadoop 2.4.0 2.4.1 2.5.0 2.5.1 2.5.2 2.6.1 2.6.2 2.6.3 2.7.1. {color} | | {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 3m 33s {color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 52s {color} | {color:green} the patch passed with JDK v1.8.0 {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 53s {color} | {color:green} the patch passed with JDK v1.7.0_80 {color} | | {color:green}+1{color} | {color:green} unit {color} | {color:green} 1m 57s {color} | {color:green} hbase-common in the patch passed. {color} | | {color:green}+1{color} | {color:green} unit {color} | {color:green} 80m 6s {color} | {color:green} hbase-server in the patch passed. {color} | | {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 27s {color} | {color:green} Patch does not generate ASF License warnings. {color} | | {color:black}{color} | {color:black} {color} | {color:black} 122m 7s {color} | {color:black} {color} | \\ \\ || Subsystem || Report/Notes || | JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12813970/HBASE-15716.branch-1.002.patch | | JIRA Issue | HBASE-15716 | | Optional Tests | asflicense javac javadoc unit findbugs hadoopcheck hbaseanti checkstyle compile | | 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 | | Build tool | maven | | Personality | /home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build@2/component/dev-support/hbase-personality.sh | | git revision | branch-1 / 34d62ec | | Default Java | 1.7.0_80 | | Multi-JDK versions | /home/jenkins/tools/java/jdk1.8.0:1.8.0 /home/jenkins/jenkins-slave/tools/hudson.model.JDK/JDK_1.7_latest_:1.7.0_80 | | findbugs | v3.0.0 | | findbugs | https://builds.apache.org/job/PreCommit-HBASE-Build/2390/artifact/patchprocess/branch-findbugs-hbase-server-warnings.html | | Test Results | https://builds.apache.org/job/PreCommit-HBASE-Build/2390/testReport/ | | modules | C: hbase-common hbase-server U: . | | Console output | https://builds.apache.org/job/PreCommit-HBASE-Build/2390/console | | Powered by | Apache Yetus 0.2.1 http://yetus.apache.org | This message was automatically generated. > HRegion#RegionScannerImpl scannerReadPoints synchronization constrains random > read > ---------------------------------------------------------------------------------- > > Key: HBASE-15716 > URL: https://issues.apache.org/jira/browse/HBASE-15716 > Project: HBase > Issue Type: Bug > Components: Performance > Reporter: stack > Assignee: stack > Attachments: 15716.prune.synchronizations.patch, > 15716.prune.synchronizations.v3.patch, 15716.prune.synchronizations.v4.patch, > 15716.prune.synchronizations.v4.patch, 15716.wip.more_to_be_done.patch, > HBASE-15716.branch-1.001.patch, HBASE-15716.branch-1.002.patch, Screen Shot > 2016-04-26 at 2.05.45 PM.png, Screen Shot 2016-04-26 at 2.06.14 PM.png, > Screen Shot 2016-04-26 at 2.07.06 PM.png, Screen Shot 2016-04-26 at 2.25.26 > PM.png, Screen Shot 2016-04-26 at 6.02.29 PM.png, Screen Shot 2016-04-27 at > 9.49.35 AM.png, before_after.png, > current-branch-1.vs.NoSynchronization.vs.Patch.png, hits.png, > remove.locks.patch, remove_cslm.patch > > > Here is a [~lhofhansl] special. > When we construct the region scanner, we get our read point and then store it > with the scanner instance in a Region scoped CSLM. This is done under a > synchronize on the CSLM. > This synchronize on a region-scoped Map creating region scanners is the > outstanding point of lock contention according to flight recorder (My work > load is workload c, random reads). -- This message was sent by Atlassian JIRA (v6.3.4#6332)