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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11755) Underconstruction blocks can be considered missing
Date Tue, 09 May 2017 21:05:04 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11755?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16003554#comment-16003554
] 

Hadoop QA commented on HDFS-11755:
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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 21s{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} 15m 20s{color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 54s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 39s{color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m  4s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 15s{color}
| {color:green} trunk passed {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red}  1m 56s{color} | {color:red}
hadoop-hdfs-project/hadoop-hdfs in trunk has 10 extant Findbugs warnings. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 44s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m  1s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 57s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 57s{color} | {color:green}
the patch passed {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  0m 38s{color}
| {color:orange} hadoop-hdfs-project/hadoop-hdfs: The patch generated 1 new + 193 unchanged
- 3 fixed = 194 total (was 196) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m  4s{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  4s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 45s{color} |
{color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 73m 20s{color} | {color:red}
hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 22s{color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}103m  5s{color} | {color:black}
{color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.hdfs.server.datanode.TestDataNodeVolumeFailureReporting |
|   | hadoop.hdfs.TestFileCorruption |
|   | hadoop.hdfs.server.datanode.TestDataNodeVolumeFailure |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:14b5c93 |
| JIRA Issue | HDFS-11755 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12867152/HDFS-11755.001.patch
|
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  unit  findbugs
 checkstyle  |
| uname | Linux f0af8b2a01b3 3.13.0-107-generic #154-Ubuntu SMP Tue Dec 20 09:57:27 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / 7dd258d |
| Default Java | 1.8.0_121 |
| findbugs | v3.1.0-RC1 |
| findbugs | https://builds.apache.org/job/PreCommit-HDFS-Build/19362/artifact/patchprocess/branch-findbugs-hadoop-hdfs-project_hadoop-hdfs-warnings.html
|
| checkstyle | https://builds.apache.org/job/PreCommit-HDFS-Build/19362/artifact/patchprocess/diff-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt
|
| unit | https://builds.apache.org/job/PreCommit-HDFS-Build/19362/artifact/patchprocess/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
|
|  Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/19362/testReport/ |
| modules | C: hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project/hadoop-hdfs |
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/19362/console |
| Powered by | Apache Yetus 0.5.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Underconstruction blocks can be considered missing
> --------------------------------------------------
>
>                 Key: HDFS-11755
>                 URL: https://issues.apache.org/jira/browse/HDFS-11755
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 3.0.0-alpha2, 2.8.1
>            Reporter: Nathan Roberts
>            Assignee: Nathan Roberts
>         Attachments: HDFS-11755.001.patch
>
>
> Following sequence of events can lead to a block underconstruction being considered missing.
> - pipeline of 3 DNs, DN1->DN2->DN3
> - DN3 has a failing disk so some updates take a long time
> - Client writes entire block and is waiting for final ack
> - DN1, DN2 and DN3 have all received the block 
> - DN1 is waiting for ACK from DN2 who is waiting for ACK from DN3
> - DN3 is having trouble finalizing the block due to the failing drive. It does eventually
succeed but it is VERY slow at doing so. 
> - DN2 times out waiting for DN3 and tears down its pieces of the pipeline, so DN1 notices
and does the same. Neither DN1 nor DN2 finalized the block.
> - DN3 finally sends an IBR to the NN indicating the block has been received.
> - Drive containing the block on DN3 fails enough that the DN takes it offline and notifies
NN of failed volume
> - NN removes DN3's replica from the triplets and then declares the block missing because
there are no other replicas
> Seems like we shouldn't consider uncompleted blocks for replication.  



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