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https://issues.apache.org/jira/browse/HADOOP-15320?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16416578#comment-16416578
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genericqa commented on HADOOP-15320:
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| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 
11s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} @author {color} | {color:green}  0m  
0s{color} | {color:green} The patch does not contain any @author tags. {color} |
| {color:green}+1{color} | {color:green} test4tests {color} | {color:green}  0m 
 0s{color} | {color:green} The patch appears to include 1 new or modified test 
files. {color} |
|| || || || {color:brown} trunk Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
28s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 27m 
31s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  2m  
8s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
37s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
52s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
12m 10s{color} | {color:green} branch has no errors when building and testing 
our client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m  
5s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
38s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
11s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
49s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
57s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  1m 
57s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
33s{color} | {color:green} hadoop-tools: The patch generated 0 new + 25 
unchanged - 24 fixed = 25 total (was 49) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
49s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m 
 0s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
12m  1s{color} | {color:green} patch has no errors when building and testing 
our client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m 
18s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
36s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  1m  
8s{color} | {color:green} hadoop-azure in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  0m 
48s{color} | {color:green} hadoop-azure-datalake in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
27s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 66m 11s{color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:8620d2b |
| JIRA Issue | HADOOP-15320 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12916504/HADOOP-15320.01.patch 
|
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  shadedclient  findbugs  checkstyle  |
| uname | Linux 04be5bf449b9 3.13.0-139-generic #188-Ubuntu SMP Tue Jan 9 
14:43:09 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / 2a2ef15 |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_151 |
| findbugs | v3.1.0-RC1 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/14400/testReport/ |
| Max. process+thread count | 301 (vs. ulimit of 10000) |
| modules | C: hadoop-tools/hadoop-azure hadoop-tools/hadoop-azure-datalake U: 
hadoop-tools |
| Console output | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/14400/console |
| Powered by | Apache Yetus 0.8.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Remove customized getFileBlockLocations for hadoop-azure and 
> hadoop-azure-datalake
> ----------------------------------------------------------------------------------
>
>                 Key: HADOOP-15320
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15320
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs/adl, fs/azure
>    Affects Versions: 2.7.3, 2.9.0, 3.0.0
>            Reporter: shanyu zhao
>            Assignee: shanyu zhao
>            Priority: Major
>         Attachments: HADOOP-15320.01.patch, HADOOP-15320.patch
>
>
> hadoop-azure and hadoop-azure-datalake have its own implementation of 
> getFileBlockLocations(), which faked a list of artificial blocks based on the 
> hard-coded block size. And each block has one host with name "localhost". 
> Take a look at this code:
> [https://github.com/apache/hadoop/blob/release-2.9.0-RC3/hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/NativeAzureFileSystem.java#L3485]
> This is a unnecessary mock up for a "remote" file system to mimic HDFS. And 
> the problem with this mock is that for large (~TB) files we generates lots of 
> artificial blocks, and FileInputFormat.getSplits() is slow in calculating 
> splits based on these blocks.
> We can safely remove this customized getFileBlockLocations() implementation, 
> fall back to the default FileSystem.getFileBlockLocations() implementation, 
> which is to return 1 block for any file with 1 host "localhost". Note that 
> this doesn't mean we will create much less splits, because the number of 
> splits is still limited by the blockSize in 
> FileInputFormat.computeSplitSize():
> {code:java}
> return Math.max(minSize, Math.min(goalSize, blockSize));{code}



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