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https://issues.apache.org/jira/browse/MAPREDUCE-6626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15129941#comment-15129941
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Hadoop QA commented on MAPREDUCE-6626:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 0s
{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:red}-1{color} | {color:red} test4tests {color} | {color:red} 0m 0s
{color} | {color:red} The patch doesn't appear to include any new or modified
tests. Please justify why no new tests are needed for this patch. Also please
list what manual steps were performed to verify this patch. {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 51s
{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 6m
33s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m 26s
{color} | {color:green} trunk passed with JDK v1.8.0_66 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m 43s
{color} | {color:green} trunk passed with JDK v1.7.0_91 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
28s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 58s
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m
26s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m
54s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 34s
{color} | {color:green} trunk passed with JDK v1.8.0_66 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 43s
{color} | {color:green} trunk passed with JDK v1.7.0_91 {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 15s
{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m
47s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m 27s
{color} | {color:green} the patch passed with JDK v1.8.0_66 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 1m 27s
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m 39s
{color} | {color:green} the patch passed with JDK v1.7.0_91 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 1m 39s
{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red} 0m 26s
{color} | {color:red} hadoop-mapreduce-project/hadoop-mapreduce-client: patch
generated 2 new + 338 unchanged - 0 fixed = 340 total (was 338) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 53s
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m
23s {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} 2m
12s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 32s
{color} | {color:green} the patch passed with JDK v1.8.0_66 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 39s
{color} | {color:green} the patch passed with JDK v1.7.0_91 {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 1m 52s
{color} | {color:green} hadoop-mapreduce-client-core in the patch passed with
JDK v1.8.0_66. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 9m 10s {color}
| {color:red} hadoop-mapreduce-client-app in the patch failed with JDK
v1.8.0_66. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 2m 9s
{color} | {color:green} hadoop-mapreduce-client-core in the patch passed with
JDK v1.7.0_91. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 9m 40s
{color} | {color:green} hadoop-mapreduce-client-app in the patch passed with
JDK v1.7.0_91. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
17s {color} | {color:green} Patch does not generate ASF License warnings.
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 49m 15s {color}
| {color:black} {color} |
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|| Reason || Tests ||
| JDK v1.8.0_66 Failed junit tests |
hadoop.mapreduce.v2.app.job.impl.TestJobImpl |
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|| Subsystem || Report/Notes ||
| Docker | Image:yetus/hadoop:0ca8df7 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12785948/MAPREDUCE.001.patch |
| JIRA Issue | MAPREDUCE-6626 |
| Optional Tests | asflicense compile javac javadoc mvninstall mvnsite
unit findbugs checkstyle |
| uname | Linux ff13898dab3b 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 / eb2fb94 |
| Default Java | 1.7.0_91 |
| Multi-JDK versions | /usr/lib/jvm/java-8-oracle:1.8.0_66
/usr/lib/jvm/java-7-openjdk-amd64:1.7.0_91 |
| findbugs | v3.0.0 |
| checkstyle |
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/6308/artifact/patchprocess/diff-checkstyle-hadoop-mapreduce-project_hadoop-mapreduce-client.txt
|
| unit |
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/6308/artifact/patchprocess/patch-unit-hadoop-mapreduce-project_hadoop-mapreduce-client_hadoop-mapreduce-client-app-jdk1.8.0_66.txt
|
| unit test logs |
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/6308/artifact/patchprocess/patch-unit-hadoop-mapreduce-project_hadoop-mapreduce-client_hadoop-mapreduce-client-app-jdk1.8.0_66.txt
|
| JDK v1.7.0_91 Test Results |
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/6308/testReport/ |
| modules | C:
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app
U: hadoop-mapreduce-project/hadoop-mapreduce-client |
| Max memory used | 77MB |
| Powered by | Apache Yetus 0.2.0-SNAPSHOT http://yetus.apache.org |
| Console output |
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/6308/console |
This message was automatically generated.
> Reuse objectMapper instance in MapReduce
> ----------------------------------------
>
> Key: MAPREDUCE-6626
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6626
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: performance
> Affects Versions: 2.7.1
> Reporter: Lin Yiqun
> Assignee: Lin Yiqun
> Attachments: MAPREDUCE-6626.002.patch, MAPREDUCE.001.patch
>
>
> Now in MapReduce, there are some places creating a new ObjectMapper instance
> every time. In wiki of ObjectMapper, it suggested:
> {code}
> Further: it is beneficial to use just one instance (or small number of
> instances) for data binding; many optimizations for reuse (of symbol tables,
> some buffers) depend on ObjectMapper instances being reused.
> {code}
> http://webcache.googleusercontent.com/search?q=cache:kybMTIJC6F4J:wiki.fasterxml.com/JacksonFAQ+&cd=4&hl=ja&ct=clnk&gl=jp,
> it's similar to HDFS-9724.
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