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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9164) hdfs-nfs connector fails on O_TRUNC
Date Wed, 28 Oct 2015 01:37:27 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14977538#comment-14977538
] 

Hadoop QA commented on HDFS-9164:
---------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | pre-patch |  18m 32s | Pre-patch trunk has 2 extant Findbugs (version
3.0.0) warnings. |
| {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 |   8m 57s | There were no new javac warning messages. |
| {color:green}+1{color} | javadoc |  11m 35s | There were no new javadoc warning messages.
|
| {color:green}+1{color} | release audit |   0m 24s | The applied patch does not increase
the total number of release audit warnings. |
| {color:red}-1{color} | checkstyle |   0m 24s | The applied patch generated  5 new checkstyle
issues (total was 41, now 45). |
| {color:green}+1{color} | whitespace |   0m  0s | The patch has no lines that end in whitespace.
|
| {color:green}+1{color} | install |   1m 41s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 36s | The patch built with eclipse:eclipse.
|
| {color:green}+1{color} | findbugs |   0m 59s | The patch does not introduce any new Findbugs
(version 3.0.0) warnings. |
| {color:green}+1{color} | native |   3m 41s | Pre-build of native portion |
| {color:green}+1{color} | hdfs tests |   2m  1s | Tests passed in hadoop-hdfs-nfs. |
| | |  48m 53s | |
\\
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12764037/HDFS-9164.1.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 68ce93c |
| Pre-patch Findbugs warnings | https://builds.apache.org/job/PreCommit-HDFS-Build/13237/artifact/patchprocess/trunkFindbugsWarningshadoop-hdfs-nfs.html
|
| checkstyle |  https://builds.apache.org/job/PreCommit-HDFS-Build/13237/artifact/patchprocess/diffcheckstylehadoop-hdfs-nfs.txt
|
| hadoop-hdfs-nfs test log | https://builds.apache.org/job/PreCommit-HDFS-Build/13237/artifact/patchprocess/testrun_hadoop-hdfs-nfs.txt
|
| Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/13237/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/13237/console |


This message was automatically generated.

> hdfs-nfs connector fails on O_TRUNC
> -----------------------------------
>
>                 Key: HDFS-9164
>                 URL: https://issues.apache.org/jira/browse/HDFS-9164
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: HDFS
>            Reporter: Constantine Peresypkin
>            Assignee: Constantine Peresypkin
>         Attachments: HDFS-9164.1.patch
>
>
> Linux NFS client will issue `open(.. O_TRUNC); write()` when overwriting a file that's
in nfs client cache (to not evict the inode, probably). Which will spectacularly fail on hdfs-nfs
with I/O error.
> Example:
> $ cp /some/file /to/hdfs/mount/
> $ cp /some/file /to/hdfs/mount/
> I/O error
> The first write will pass if the file is not in cache, the second one will always fail.



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