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https://issues.apache.org/jira/browse/HDFS-8486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14567998#comment-14567998
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Hadoop QA commented on HDFS-8486:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | pre-patch | 15m 10s | Findbugs (version ) appears to
be broken on trunk. |
| {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 1 new or modified test files. |
| {color:green}+1{color} | javac | 7m 28s | There were no new javac warning
messages. |
| {color:green}+1{color} | javadoc | 9m 30s | There were no new javadoc
warning messages. |
| {color:green}+1{color} | release audit | 0m 22s | The applied patch does
not increase the total number of release audit warnings. |
| {color:green}+1{color} | checkstyle | 0m 50s | There were no new checkstyle
issues. |
| {color:green}+1{color} | whitespace | 0m 0s | The patch has no lines that
end in whitespace. |
| {color:green}+1{color} | install | 1m 35s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse | 0m 33s | The patch built with
eclipse:eclipse. |
| {color:green}+1{color} | findbugs | 3m 12s | The patch does not introduce
any new Findbugs (version 3.0.0) warnings. |
| {color:green}+1{color} | native | 3m 16s | Pre-build of native portion |
| {color:red}-1{color} | hdfs tests | 162m 13s | Tests failed in hadoop-hdfs. |
| | | 204m 13s | |
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|| Reason || Tests ||
| Failed unit tests | hadoop.hdfs.server.namenode.TestFileTruncate |
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|| Subsystem || Report/Notes ||
| Patch URL |
http://issues.apache.org/jira/secure/attachment/12736613/HDFS-8486.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 63e3fee |
| hadoop-hdfs test log |
https://builds.apache.org/job/PreCommit-HDFS-Build/11190/artifact/patchprocess/testrun_hadoop-hdfs.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-HDFS-Build/11190/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/11190/console |
This message was automatically generated.
> DN startup may cause severe data loss
> -------------------------------------
>
> Key: HDFS-8486
> URL: https://issues.apache.org/jira/browse/HDFS-8486
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Affects Versions: 0.23.1, 2.0.0-alpha
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Priority: Blocker
> Attachments: HDFS-8486.patch, HDFS-8486.patch
>
>
> A race condition between block pool initialization and the directory scanner
> may cause a mass deletion of blocks in multiple storages.
> If block pool initialization finds a block on disk that is already in the
> replica map, it deletes one of the blocks based on size, GS, etc.
> Unfortunately it _always_ deletes one of the blocks even if identical, thus
> the replica map _must_ be empty when the pool is initialized.
> The directory scanner starts at a random time within its periodic interval
> (default 6h). If the scanner starts very early it races to populate the
> replica map, causing the block pool init to erroneously delete blocks.
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