[ 
https://issues.apache.org/jira/browse/HDFS-9220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14957975#comment-14957975
 ] 

Hadoop QA commented on HDFS-9220:
---------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | pre-patch |  22m  9s | Pre-patch trunk has 1 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 26s | There were no new javadoc 
warning messages. |
| {color:green}+1{color} | release audit |   0m 25s | The applied patch does 
not increase the total number of release audit warnings. |
| {color:red}-1{color} | checkstyle |   1m 32s | The applied patch generated  1 
new checkstyle issues (total was 60, now 60). |
| {color:green}+1{color} | whitespace |   0m  0s | The patch has no lines that 
end in whitespace. |
| {color:green}+1{color} | install |   1m 30s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 34s | The patch built with 
eclipse:eclipse. |
| {color:green}+1{color} | findbugs |   2m 31s | The patch does not introduce 
any new Findbugs (version 3.0.0) warnings. |
| {color:green}+1{color} | native |   3m 12s | Pre-build of native portion |
| {color:red}-1{color} | hdfs tests |  53m 52s | Tests failed in hadoop-hdfs. |
| | | 106m 11s | |
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|| Reason || Tests ||
| Failed unit tests | hadoop.hdfs.server.namenode.ha.TestStandbyCheckpoints |
|   | hadoop.hdfs.web.TestWebHDFSXAttr |
|   | hadoop.hdfs.web.TestWebHDFS |
|   | hadoop.hdfs.web.resources.TestParam |
|   | hadoop.hdfs.TestMiniDFSCluster |
|   | hadoop.hdfs.server.datanode.TestDirectoryScanner |
|   | hadoop.fs.TestGlobPaths |
|   | hadoop.hdfs.server.balancer.TestBalancerWithSaslDataTransfer |
| Timed out tests | org.apache.hadoop.hdfs.TestInjectionForSimulatedStorage |
|   | org.apache.hadoop.hdfs.web.TestWebHDFSForHA |
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|| Subsystem || Report/Notes ||
| Patch URL | 
http://issues.apache.org/jira/secure/attachment/12766603/HDFS-9220.002.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 3d50855 |
| Pre-patch Findbugs warnings | 
https://builds.apache.org/job/PreCommit-HDFS-Build/12989/artifact/patchprocess/trunkFindbugsWarningshadoop-hdfs.html
 |
| checkstyle |  
https://builds.apache.org/job/PreCommit-HDFS-Build/12989/artifact/patchprocess/diffcheckstylehadoop-hdfs.txt
 |
| hadoop-hdfs test log | 
https://builds.apache.org/job/PreCommit-HDFS-Build/12989/artifact/patchprocess/testrun_hadoop-hdfs.txt
 |
| Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/12989/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf904.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/12989/console |


This message was automatically generated.

> Reading small file (< 512 bytes) that is open for append fails due to 
> incorrect checksum
> ----------------------------------------------------------------------------------------
>
>                 Key: HDFS-9220
>                 URL: https://issues.apache.org/jira/browse/HDFS-9220
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.7.1
>            Reporter: Bogdan Raducanu
>            Assignee: Jing Zhao
>            Priority: Blocker
>         Attachments: HDFS-9220.000.patch, HDFS-9220.001.patch, 
> HDFS-9220.002.patch, test2.java
>
>
> Exception:
> 2015-10-09 14:59:40 WARN  DFSClient:1150 - fetchBlockByteRange(). Got a 
> checksum exception for /tmp/file0.05355529331575182 at 
> BP-353681639-10.10.10.10-1437493596883:blk_1075692769_9244882:0 from 
> DatanodeInfoWithStorage[10.10.10.10]:5001
> All 3 replicas cause this exception and the read fails entirely with:
> BlockMissingException: Could not obtain block: 
> BP-353681639-10.10.10.10-1437493596883:blk_1075692769_9244882 
> file=/tmp/file0.05355529331575182
> Code to reproduce is attached.
> Does not happen in 2.7.0.
> Data is read correctly if checksum verification is disabled.
> More generally, the failure happens when reading from the last block of a 
> file and the last block has <= 512 bytes.



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