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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9833) Erasure coding: recomputing block checksum on the fly by reconstructing the missed/corrupt block data
Date Tue, 24 May 2016 08:27:13 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9833?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15297887#comment-15297887
] 

Hadoop QA commented on HDFS-9833:
---------------------------------

| (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 13s {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:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 17s {color} | {color:blue}
Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 7m 49s {color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m 39s {color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 34s {color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m 42s {color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 24s {color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 3m 29s {color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 31s {color} |
{color:green} trunk passed {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 7s {color} | {color:blue}
Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 1m 29s {color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m 34s {color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} cc {color} | {color:green} 1m 34s {color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 1m 34s {color} | {color:green}
the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red} 0m 30s {color} | {color:red}
hadoop-hdfs-project: patch generated 10 new + 103 unchanged - 0 fixed = 113 total (was 103)
{color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m 29s {color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 21s {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:red}-1{color} | {color:red} findbugs {color} | {color:red} 2m 1s {color} | {color:red}
hadoop-hdfs-project/hadoop-hdfs generated 2 new + 0 unchanged - 0 fixed = 2 total (was 0)
{color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 31s {color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 1m 0s {color} | {color:green}
hadoop-hdfs-client in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 66m 8s {color} | {color:red}
hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 25s {color}
| {color:green} Patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 97m 30s {color} | {color:black}
{color} |
\\
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|| Reason || Tests ||
| FindBugs | module:hadoop-hdfs-project/hadoop-hdfs |
|  |  Unread field:BlockChecksumHelper.java:[line 347] |
|  |  Should org.apache.hadoop.hdfs.server.datanode.BlockChecksumHelper$BlockGroupNonStripedChecksumComputer$ECBlockInfo
be a _static_ inner class?  At BlockChecksumHelper.java:inner class?  At BlockChecksumHelper.java:[lines
354-364] |
| Failed junit tests | hadoop.hdfs.server.balancer.TestBalancer |
|   | hadoop.hdfs.TestAsyncDFSRename |
|   | hadoop.hdfs.TestMissingBlocksAlert |
|   | hadoop.hdfs.TestDFSUpgradeFromImage |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:2c91fd8 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12805822/HDFS-9833-03.patch
|
| JIRA Issue | HDFS-9833 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  unit  findbugs
 checkstyle  cc  |
| uname | Linux 41f122c5b459 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 / b4078bd |
| Default Java | 1.8.0_91 |
| findbugs | v3.0.0 |
| checkstyle | https://builds.apache.org/job/PreCommit-HDFS-Build/15536/artifact/patchprocess/diff-checkstyle-hadoop-hdfs-project.txt
|
| findbugs | https://builds.apache.org/job/PreCommit-HDFS-Build/15536/artifact/patchprocess/new-findbugs-hadoop-hdfs-project_hadoop-hdfs.html
|
| unit | https://builds.apache.org/job/PreCommit-HDFS-Build/15536/artifact/patchprocess/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
|
| unit test logs |  https://builds.apache.org/job/PreCommit-HDFS-Build/15536/artifact/patchprocess/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
|
|  Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/15536/testReport/ |
| modules | C:  hadoop-hdfs-project/hadoop-hdfs-client   hadoop-hdfs-project/hadoop-hdfs 
U: hadoop-hdfs-project |
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/15536/console |
| Powered by | Apache Yetus 0.2.0   http://yetus.apache.org |


This message was automatically generated.



> Erasure coding: recomputing block checksum on the fly by reconstructing the missed/corrupt
block data
> -----------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-9833
>                 URL: https://issues.apache.org/jira/browse/HDFS-9833
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Kai Zheng
>            Assignee: Rakesh R
>              Labels: hdfs-ec-3.0-must-do
>         Attachments: HDFS-9833-00-draft.patch, HDFS-9833-01.patch, HDFS-9833-02.patch,
HDFS-9833-03.patch
>
>
> As discussed in HDFS-8430 and HDFS-9694, to compute striped file checksum even some of
striped blocks are missed, we need to consider recomputing block checksum on the fly for the
missed/corrupt blocks. To recompute the block checksum, the block data needs to be reconstructed
by erasure decoding, and the main needed codes for the block reconstruction could be borrowed
from HDFS-9719, the refactoring of the existing {{ErasureCodingWorker}}. In EC worker, reconstructed
blocks need to be written out to target datanodes, but here in this case, the remote writing
isn't necessary, as the reconstructed block data is only used to recompute the checksum.



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