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https://issues.apache.org/jira/browse/HADOOP-12326?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14712814#comment-14712814
 ] 

Hadoop QA commented on HADOOP-12326:
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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 57s | Pre-patch trunk has 4 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 3 new or modified test files. |
| {color:green}+1{color} | javac |   7m 41s | There were no new javac warning 
messages. |
| {color:green}+1{color} | javadoc |   9m 47s | 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:green}+1{color} | site |   2m 57s | Site still builds. |
| {color:red}-1{color} | checkstyle |   2m  2s | The applied patch generated  
32 new checkstyle issues (total was 424, now 442). |
| {color:red}-1{color} | whitespace |   0m  3s | The patch has 2  line(s) that 
end in whitespace. Use git apply --whitespace=fix. |
| {color:green}+1{color} | install |   1m 32s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 31s | The patch built with 
eclipse:eclipse. |
| {color:green}+1{color} | findbugs |   5m  5s | The patch does not introduce 
any new Findbugs (version 3.0.0) warnings. |
| {color:red}-1{color} | common tests |  22m 17s | Tests failed in 
hadoop-common. |
| {color:green}+1{color} | tools/hadoop tests |   6m 13s | Tests passed in 
hadoop-streaming. |
| {color:red}-1{color} | hdfs tests | 161m 44s | Tests failed in hadoop-hdfs. |
| | | 243m 47s | |
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|| Reason || Tests ||
| Failed unit tests | hadoop.cli.TestCLI |
|   | hadoop.fs.permission.TestStickyBit |
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|| Subsystem || Report/Notes ||
| Patch URL | 
http://issues.apache.org/jira/secure/attachment/12752394/HADOOP-12326.007.patch 
|
| Optional Tests | javadoc javac unit findbugs checkstyle site |
| git revision | trunk / a4d9acc |
| Pre-patch Findbugs warnings | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/7529/artifact/patchprocess/trunkFindbugsWarningshadoop-hdfs.html
 |
| checkstyle |  
https://builds.apache.org/job/PreCommit-HADOOP-Build/7529/artifact/patchprocess/diffcheckstylehadoop-common.txt
 |
| whitespace | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/7529/artifact/patchprocess/whitespace.txt
 |
| hadoop-common test log | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/7529/artifact/patchprocess/testrun_hadoop-common.txt
 |
| hadoop-streaming test log | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/7529/artifact/patchprocess/testrun_hadoop-streaming.txt
 |
| hadoop-hdfs test log | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/7529/artifact/patchprocess/testrun_hadoop-hdfs.txt
 |
| Test Results | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/7529/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf906.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-HADOOP-Build/7529/console |


This message was automatically generated.

> Implement ChecksumFileSystem#getFileChecksum equivalent to HDFS for easy check
> ------------------------------------------------------------------------------
>
>                 Key: HADOOP-12326
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12326
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs
>    Affects Versions: 2.7.1
>            Reporter: Gera Shegalov
>            Assignee: Gera Shegalov
>         Attachments: HADOOP-12326.001.patch, HADOOP-12326.002.patch, 
> HADOOP-12326.003.patch, HADOOP-12326.004.patch, HADOOP-12326.005.patch, 
> HADOOP-12326.007.patch
>
>
> If we have same-content files, one local and one remotely on HDFS (after 
> downloading or uploading), getFileChecksum can provide a quick check whether 
> they are consistent.  To this end, we can switch to CRC32C on local 
> filesystem. The difference in block sizes does not matter, because for the 
> local filesystem it's just a logical parameter.
> {code}
> $ hadoop fs -Dfs.local.block.size=134217728 -checksum 
> file:${PWD}/part-m-00000 part-m-00000
> 15/08/15 13:30:02 WARN util.NativeCodeLoader: Unable to load native-hadoop 
> library for your platform... using builtin-java classes where applicable
> file:///Users/gshegalov/workspace/hadoop-common/part-m-00000  
> MD5-of-262144MD5-of-512CRC32C   
> 000002000000000000040000e84fb07f8c9d4ef3acb5d1983a7e2a68
> part-m-00000  MD5-of-262144MD5-of-512CRC32C   
> 000002000000000000040000e84fb07f8c9d4ef3acb5d1983a7e2a68
> {code}



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