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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11609) Some blocks can be permanently lost if nodes are decommissioned while dead
Date Tue, 04 Apr 2017 16:54:41 GMT

    [ 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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