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Hadoop QA commented on MAPREDUCE-6689: -------------------------------------- | (x) *{color:red}-1 overall{color}* | \\ \\ || Vote || Subsystem || Runtime || Comment || | {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 13s {color} | {color:blue} Docker mode activated. {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:green}+1{color} | {color:green} mvninstall {color} | {color:green} 7m 24s {color} | {color:green} trunk passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 22s {color} | {color:green} trunk passed with JDK v1.8.0_91 {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 25s {color} | {color:green} trunk passed with JDK v1.7.0_95 {color} | | {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 17s {color} | {color:green} trunk passed {color} | | {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 27s {color} | {color:green} trunk passed {color} | | {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 13s {color} | {color:green} trunk passed {color} | | {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 0m 42s {color} | {color:green} trunk passed {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 15s {color} | {color:green} trunk passed with JDK v1.8.0_91 {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 18s {color} | {color:green} trunk passed with JDK v1.7.0_95 {color} | | {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m 23s {color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 19s {color} | {color:green} the patch passed with JDK v1.8.0_91 {color} | | {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 19s {color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 22s {color} | {color:green} the patch passed with JDK v1.7.0_95 {color} | | {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 22s {color} | {color:green} the patch passed {color} | | {color:red}-1{color} | {color:red} checkstyle {color} | {color:red} 0m 14s {color} | {color:red} hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app: patch generated 1 new + 111 unchanged - 0 fixed = 112 total (was 111) {color} | | {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 26s {color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 11s {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} findbugs {color} | {color:green} 0m 58s {color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 13s {color} | {color:green} the patch passed with JDK v1.8.0_91 {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 15s {color} | {color:green} the patch passed with JDK v1.7.0_95 {color} | | {color:green}+1{color} | {color:green} unit {color} | {color:green} 8m 32s {color} | {color:green} hadoop-mapreduce-client-app in the patch passed with JDK v1.8.0_91. {color} | | {color:green}+1{color} | {color:green} unit {color} | {color:green} 9m 16s {color} | {color:green} hadoop-mapreduce-client-app in the patch passed with JDK v1.7.0_95. {color} | | {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 20s {color} | {color:green} Patch does not generate ASF License warnings. {color} | | {color:black}{color} | {color:black} {color} | {color:black} 33m 4s {color} | {color:black} {color} | \\ \\ || Subsystem || Report/Notes || | Docker | Image:yetus/hadoop:cf2ee45 | | JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12802512/MAPREDUCE-6689.1.patch | | JIRA Issue | MAPREDUCE-6689 | | Optional Tests | asflicense compile javac javadoc mvninstall mvnsite unit findbugs checkstyle | | uname | Linux 009df3d66296 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 | /testptch/hadoop/patchprocess/precommit/personality/provided.sh | | git revision | trunk / 2835f14 | | Default Java | 1.7.0_95 | | Multi-JDK versions | /usr/lib/jvm/java-8-oracle:1.8.0_91 /usr/lib/jvm/java-7-openjdk-amd64:1.7.0_95 | | findbugs | v3.0.0 | | checkstyle | https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/6484/artifact/patchprocess/diff-checkstyle-hadoop-mapreduce-project_hadoop-mapreduce-client_hadoop-mapreduce-client-app.txt | | JDK v1.7.0_95 Test Results | https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/6484/testReport/ | | modules | C: hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app U: hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app | | Console output | https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/6484/console | | Powered by | Apache Yetus 0.2.0 http://yetus.apache.org | This message was automatically generated. > MapReduce job can infinitely increase number of reducer resource requests > ------------------------------------------------------------------------- > > Key: MAPREDUCE-6689 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-6689 > Project: Hadoop Map/Reduce > Issue Type: Bug > Reporter: Wangda Tan > Assignee: Wangda Tan > Priority: Blocker > Attachments: MAPREDUCE-6689.1.patch > > > We have seen this issue from one of our clusters: when running terasort > map-reduce job, some mappers failed after reducer started, and then MR AM > tries to preempt reducers to schedule these failed mappers. > After that, MR AM enters an infinite loop, for every > RMContainerAllocator#heartbeat run, it: > - In {{preemptReducesIfNeeded}}, it cancels all scheduled reducer requests. > (total scheduled reducers = 1024) > - Then, in {{scheduleReduces}}, it ramps up all reducers (total = 1024). > As a result, we can see total #requested-containers increased 1024 for every > MRAM-RM heartbeat (1 sec per heartbeat). The AM is hanging for 18+ hours, so > we get 18 * 3600 * 1024 ~ 66M+ requested containers in RM side. > And this bug also triggered YARN-4844, which makes RM stop scheduling > anything. > Thanks to [~sidharta-s] for helping with analysis. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: mapreduce-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: mapreduce-issues-h...@hadoop.apache.org