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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9205) Do not sehedule corrupted blocks for replication
Date Wed, 07 Oct 2015 20:14:27 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14947497#comment-14947497
] 

Hadoop QA commented on HDFS-9205:
---------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  20m 19s | Pre-patch trunk compilation is healthy. |
| {color:green}+1{color} | @author |   0m  0s | The patch does not contain any @author tags.
|
| {color:green}+1{color} | tests included |   0m  0s | The patch appears to include 2 new
or modified test files. |
| {color:green}+1{color} | javac |   8m 58s | There were no new javac warning messages. |
| {color:green}+1{color} | javadoc |  11m 56s | There were no new javadoc warning messages.
|
| {color:red}-1{color} | release audit |   0m 23s | The applied patch generated 1 release
audit warnings. |
| {color:red}-1{color} | checkstyle |   1m 35s | The applied patch generated  4 new checkstyle
issues (total was 198, now 199). |
| {color:red}-1{color} | whitespace |   0m  0s | The patch has 1  line(s) that end in whitespace.
Use git apply --whitespace=fix. |
| {color:green}+1{color} | install |   1m 46s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 39s | The patch built with eclipse:eclipse.
|
| {color:green}+1{color} | findbugs |   2m 58s | The patch does not introduce any new Findbugs
(version 3.0.0) warnings. |
| {color:green}+1{color} | native |   3m 39s | Pre-build of native portion |
| {color:red}-1{color} | hdfs tests | 232m 18s | Tests failed in hadoop-hdfs. |
| | | 284m 38s | |
\\
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|| Reason || Tests ||
| Failed unit tests | hadoop.hdfs.server.datanode.TestReadOnlySharedStorage |
|   | hadoop.hdfs.TestDataTransferKeepalive |
|   | hadoop.hdfs.server.blockmanagement.TestReplicationPolicy |
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12765399/h9205_20151007b.patch
|
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 99e5204 |
| Release Audit | https://builds.apache.org/job/PreCommit-HDFS-Build/12835/artifact/patchprocess/patchReleaseAuditProblems.txt
|
| checkstyle |  https://builds.apache.org/job/PreCommit-HDFS-Build/12835/artifact/patchprocess/diffcheckstylehadoop-hdfs.txt
|
| whitespace | https://builds.apache.org/job/PreCommit-HDFS-Build/12835/artifact/patchprocess/whitespace.txt
|
| hadoop-hdfs test log | https://builds.apache.org/job/PreCommit-HDFS-Build/12835/artifact/patchprocess/testrun_hadoop-hdfs.txt
|
| Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/12835/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf909.gq1.ygridcore.net 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 |
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/12835/console |


This message was automatically generated.

> Do not sehedule corrupted blocks for replication
> ------------------------------------------------
>
>                 Key: HDFS-9205
>                 URL: https://issues.apache.org/jira/browse/HDFS-9205
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>            Reporter: Tsz Wo Nicholas Sze
>            Assignee: Tsz Wo Nicholas Sze
>            Priority: Minor
>         Attachments: h9205_20151007.patch, h9205_20151007b.patch
>
>
> Corrupted blocks by definition are blocks cannot be read. As a consequence, they cannot
be replicated.  In UnderReplicatedBlocks, there is a queue for QUEUE_WITH_CORRUPT_BLOCKS and
chooseUnderReplicatedBlocks may choose blocks from it.  It seems that scheduling corrupted
block for replication is wasting resource and potentially slow down replication for the higher
priority blocks.



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