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https://issues.apache.org/jira/browse/HDFS-11609?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15955417#comment-15955417
 ] 

Hadoop QA commented on HDFS-11609:
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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} 14m 
22s{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}  9m 
18s{color} | {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
39s{color} | {color:green} branch-2 passed with JDK v1.8.0_121 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
43s{color} | {color:green} branch-2 passed with JDK v1.7.0_121 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
30s{color} | {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
52s{color} | {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 
17s{color} | {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m 
58s{color} | {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
56s{color} | {color:green} branch-2 passed with JDK v1.8.0_121 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
35s{color} | {color:green} branch-2 passed with JDK v1.7.0_121 {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
43s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
36s{color} | {color:green} the patch passed with JDK v1.8.0_121 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
36s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
40s{color} | {color:green} the patch passed with JDK v1.7.0_121 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
40s{color} | {color:green} the patch passed {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  
0m 26s{color} | {color:orange} hadoop-hdfs-project/hadoop-hdfs: The patch 
generated 1 new + 184 unchanged - 1 fixed = 185 total (was 185) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
48s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 
13s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m 
 0s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  2m  
6s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
50s{color} | {color:green} the patch passed with JDK v1.8.0_121 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
33s{color} | {color:green} the patch passed with JDK v1.7.0_121 {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 48m 26s{color} 
| {color:red} hadoop-hdfs in the patch failed with JDK v1.7.0_121. {color} |
| {color:red}-1{color} | {color:red} asflicense {color} | {color:red}  0m 
20s{color} | {color:red} The patch generated 1 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}145m 13s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| JDK v1.8.0_121 Failed junit tests | hadoop.hdfs.web.TestWebHDFS |
| JDK v1.8.0_121 Timed out junit tests | 
org.apache.hadoop.hdfs.server.datanode.TestDataNodeVolumeFailureReporting |
| JDK v1.7.0_121 Failed junit tests | 
hadoop.hdfs.server.datanode.metrics.TestDataNodeOutlierDetectionViaMetrics |
|   | hadoop.metrics2.sink.TestRollingFileSystemSinkWithSecureHdfs |
|   | hadoop.hdfs.server.namenode.TestFSImageWithXAttr |
|   | hadoop.hdfs.server.blockmanagement.TestReplicationPolicyWithUpgradeDomain 
|
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:b59b8b7 |
| JIRA Issue | HDFS-11609 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12861899/HDFS-11609.branch-2.patch
 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  findbugs  checkstyle  |
| uname | Linux ba5ae41e22cc 3.13.0-106-generic #153-Ubuntu SMP Tue Dec 6 
15:44:32 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh 
|
| git revision | branch-2 / 8c21b2a |
| Default Java | 1.7.0_121 |
| Multi-JDK versions |  /usr/lib/jvm/java-8-oracle:1.8.0_121 
/usr/lib/jvm/java-7-openjdk-amd64:1.7.0_121 |
| findbugs | v3.0.0 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18969/artifact/patchprocess/diff-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18969/artifact/patchprocess/patch-unit-hadoop-hdfs-project_hadoop-hdfs-jdk1.7.0_121.txt
 |
| JDK v1.7.0_121  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18969/testReport/ |
| asflicense | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18969/artifact/patchprocess/patch-asflicense-problems.txt
 |
| modules | C: hadoop-hdfs-project/hadoop-hdfs U: 
hadoop-hdfs-project/hadoop-hdfs |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18969/console |
| Powered by | Apache Yetus 0.5.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Some blocks can be permanently lost if nodes are decommissioned while dead
> --------------------------------------------------------------------------
>
>                 Key: HDFS-11609
>                 URL: https://issues.apache.org/jira/browse/HDFS-11609
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 2.7.0
>            Reporter: Kihwal Lee
>            Assignee: Kihwal Lee
>            Priority: Critical
>         Attachments: HDFS-11609.branch-2.patch, HDFS-11609.trunk.patch
>
>
> When all the nodes containing a replica of a block are decommissioned while 
> they are dead, they get decommissioned right away even if there are missing 
> blocks. This behavior was introduced by HDFS-7374.
> The problem starts when those decommissioned nodes are brought back online. 
> The namenode no longer shows missing blocks, which creates a false sense of 
> cluster health. When the decommissioned nodes are removed and reformatted, 
> the block data is permanently lost. The namenode will report missing blocks 
> after the heartbeat recheck interval (e.g. 10 minutes) from the moment the 
> last node is taken down.
> There are multiple issues in the code. As some cause different behaviors in 
> testing vs. production, it took a while to reproduce it in a unit test. I 
> will present analysis and proposal soon.



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