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https://issues.apache.org/jira/browse/HDFS-12131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16156089#comment-16156089
 ] 

Hadoop QA commented on HDFS-12131:
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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} 10m 
38s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {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 2 new or modified test 
files. {color} |
|| || || || {color:brown} branch-2.7 Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
18s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  7m 
42s{color} | {color:green} branch-2.7 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  5m 
17s{color} | {color:green} branch-2.7 passed with JDK v1.8.0_144 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  6m  
8s{color} | {color:green} branch-2.7 passed with JDK v1.7.0_151 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
21s{color} | {color:green} branch-2.7 passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 
44s{color} | {color:green} branch-2.7 passed {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red}  1m 
33s{color} | {color:red} hadoop-common-project/hadoop-common in branch-2.7 has 
3 extant Findbugs warnings. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
39s{color} | {color:green} branch-2.7 passed with JDK v1.8.0_144 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  2m 
45s{color} | {color:green} branch-2.7 passed with JDK v1.7.0_151 {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
14s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m 
40s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  6m 
21s{color} | {color:green} the patch passed with JDK v1.8.0_144 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  6m 
21s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  6m 
15s{color} | {color:green} the patch passed with JDK v1.7.0_151 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  6m 
15s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
21s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 
52s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} whitespace {color} | {color:red}  0m  
0s{color} | {color:red} The patch has 125 line(s) that end in whitespace. Use 
git apply --whitespace=fix <<patch_file>>. Refer 
https://git-scm.com/docs/git-apply {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  5m  
9s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
45s{color} | {color:green} the patch passed with JDK v1.8.0_144 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  2m 
44s{color} | {color:green} the patch passed with JDK v1.7.0_151 {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 22m 56s{color} 
| {color:red} hadoop-common in the patch failed with JDK v1.7.0_151. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}140m 43s{color} 
| {color:red} hadoop-hdfs in the patch failed with JDK v1.7.0_151. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  3m 
10s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}335m 31s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| JDK v1.8.0_144 Failed junit tests | hadoop.ipc.TestDecayRpcScheduler |
|   | hadoop.util.bloom.TestBloomFilters |
|   | hadoop.hdfs.server.namenode.ha.TestDNFencing |
|   | hadoop.hdfs.server.datanode.TestDirectoryScanner |
|   | hadoop.hdfs.web.TestWebHdfsTokens |
|   | hadoop.hdfs.server.namenode.TestFileTruncate |
|   | hadoop.hdfs.server.namenode.snapshot.TestRenameWithSnapshots |
|   | hadoop.hdfs.server.namenode.ha.TestHAAppend |
|   | hadoop.hdfs.server.namenode.TestDeadDatanode |
|   | hadoop.hdfs.server.datanode.fsdataset.impl.TestRbwSpaceReservation |
| JDK v1.8.0_144 Timed out junit tests | 
org.apache.hadoop.conf.TestConfiguration |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:67e87c9 |
| JIRA Issue | HDFS-12131 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12885614/HDFS-12131-branch-2.7.006.patch
 |
| Optional Tests |  asflicense  mvnsite  compile  javac  javadoc  mvninstall  
unit  findbugs  checkstyle  |
| uname | Linux f72cbbb5a63d 3.13.0-117-generic #164-Ubuntu SMP Fri Apr 7 
11:05:26 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh 
|
| git revision | branch-2.7 / c2350ec |
| Default Java | 1.7.0_151 |
| Multi-JDK versions |  /usr/lib/jvm/java-8-oracle:1.8.0_144 
/usr/lib/jvm/java-7-openjdk-amd64:1.7.0_151 |
| findbugs | v3.0.0 |
| findbugs | 
https://builds.apache.org/job/PreCommit-HDFS-Build/21023/artifact/patchprocess/branch-findbugs-hadoop-common-project_hadoop-common-warnings.html
 |
| whitespace | 
https://builds.apache.org/job/PreCommit-HDFS-Build/21023/artifact/patchprocess/whitespace-eol.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/21023/artifact/patchprocess/patch-unit-hadoop-common-project_hadoop-common-jdk1.7.0_151.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/21023/artifact/patchprocess/patch-unit-hadoop-hdfs-project_hadoop-hdfs-jdk1.7.0_151.txt
 |
| JDK v1.7.0_151  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/21023/testReport/ |
| modules | C: hadoop-common-project/hadoop-common 
hadoop-hdfs-project/hadoop-hdfs U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/21023/console |
| Powered by | Apache Yetus 0.6.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Add some of the FSNamesystem JMX values as metrics
> --------------------------------------------------
>
>                 Key: HDFS-12131
>                 URL: https://issues.apache.org/jira/browse/HDFS-12131
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs, namenode
>            Reporter: Erik Krogen
>            Assignee: Erik Krogen
>            Priority: Minor
>             Fix For: 2.9.0, 3.0.0-beta1, 2.8.3
>
>         Attachments: HDFS-12131.000.patch, HDFS-12131.001.patch, 
> HDFS-12131.002.patch, HDFS-12131.002.patch, HDFS-12131.003.patch, 
> HDFS-12131.004.patch, HDFS-12131.005.patch, HDFS-12131.006.patch, 
> HDFS-12131-branch-2.006.patch, HDFS-12131-branch-2.7.006.patch, 
> HDFS-12131-branch-2.8.006.patch
>
>
> A number of useful numbers are emitted via the FSNamesystem JMX, but not 
> through the metrics system. These would be useful to be able to track over 
> time, e.g. to alert on via standard metrics systems or to view trends and 
> rate changes:
> * NumLiveDataNodes
> * NumDeadDataNodes
> * NumDecomLiveDataNodes
> * NumDecomDeadDataNodes
> * NumDecommissioningDataNodes
> * NumStaleStorages
> * VolumeFailuresTotal
> * EstimatedCapacityLostTotal
> * NumInMaintenanceLiveDataNodes
> * NumInMaintenanceDeadDataNodes
> * NumEnteringMaintenanceDataNodes
> This is a simple change that just requires annotating the JMX methods with 
> {{@Metric}}.



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