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https://issues.apache.org/jira/browse/MAPREDUCE-7241?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16932696#comment-16932696
 ] 

Hadoop QA commented on MAPREDUCE-7241:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 
27s{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:red}-1{color} | {color:red} test4tests {color} | {color:red}  0m  
0s{color} | {color:red} The patch doesn't appear to include any new or modified 
tests. Please justify why no new tests are needed for this patch. Also please 
list what manual steps were performed to verify this patch. {color} |
|| || || || {color:brown} trunk Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 23m 
13s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
33s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
31s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
39s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
11m 55s{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}  0m 
57s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
23s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
30s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
27s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
27s{color} | {color:green} the patch passed {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  
0m 22s{color} | {color:orange} 
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core: 
The patch generated 2 new + 146 unchanged - 0 fixed = 148 total (was 146) 
{color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
30s{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} 
11m 40s{color} | {color:green} patch has no errors when building and testing 
our client artifacts. {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red}  1m  
1s{color} | {color:red} 
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core 
generated 1 new + 0 unchanged - 0 fixed = 1 total (was 0) {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
18s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red}  5m  6s{color} 
| {color:red} hadoop-mapreduce-client-core in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
31s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 59m 14s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| FindBugs | 
module:hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core
 |
|  |  Useless object stored in variable copyLocs of method 
org.apache.hadoop.mapreduce.lib.input.FileInputFormat.dup(FileStatus)  At 
FileInputFormat.java:copyLocs of method 
org.apache.hadoop.mapreduce.lib.input.FileInputFormat.dup(FileStatus)  At 
FileInputFormat.java:[line 372] |
| Failed junit tests | hadoop.mapreduce.lib.input.TestFileInputFormat |
|   | hadoop.mapred.TestFileInputFormat |
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|| Subsystem || Report/Notes ||
| Docker | Client=19.03.1 Server=19.03.1 Image:yetus/hadoop:39e82acc485 |
| JIRA Issue | MAPREDUCE-7241 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12980617/MAPREDUCE-7241.01.patch
 |
| Optional Tests |  dupname  asflicense  compile  javac  javadoc  mvninstall  
mvnsite  unit  shadedclient  findbugs  checkstyle  |
| uname | Linux e11cbec0c284 4.15.0-58-generic #64-Ubuntu SMP Tue Aug 6 
11:12:41 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / 8d9e9ec |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_222 |
| findbugs | v3.1.0-RC1 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/7665/artifact/out/diff-checkstyle-hadoop-mapreduce-project_hadoop-mapreduce-client_hadoop-mapreduce-client-core.txt
 |
| findbugs | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/7665/artifact/out/new-findbugs-hadoop-mapreduce-project_hadoop-mapreduce-client_hadoop-mapreduce-client-core.html
 |
| unit | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/7665/artifact/out/patch-unit-hadoop-mapreduce-project_hadoop-mapreduce-client_hadoop-mapreduce-client-core.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/7665/testReport/ |
| Max. process+thread count | 1556 (vs. ulimit of 5500) |
| modules | C: 
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core 
U: 
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core |
| Console output | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/7665/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> FileInputFormat listStatus causes oom when there are lots of files in HDFS
> --------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-7241
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-7241
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: job submission
>    Affects Versions: 2.6.1
>            Reporter: Zhihua Deng
>            Priority: Major
>         Attachments: MAPREDUCE-7241.01.patch, filestatus.png
>
>
> This case sometimes sees in hive when user issues queries over all partitions 
> by mistakes. The file status cached when listing status could accumulate to 
> over 3g.  After digging into the  dumped memory, the LocatedBlock occupies 
> about 50%(sometimes over 60%) memory that retained by LocatedFileStatus, as 
> shows followed,
> !filestatus.png!
> Right now we only extract the block locations info from LocatedFileStatus,  
> the datanode infos(types) or block token are not taken into account. So there 
> is no need to cache LocatedBlock, as do like this:
> BlockLocation[] blockLocations = dedup(stat.getBlockLocations());
>  LocatedFileStatus shrink = new LocatedFileStatus(stat, blockLocations);
> private static BlockLocation[] dup(BlockLocation[] blockLocations) {
>      BlockLocation[] copyLocs = new BlockLocation[blockLocations.length];
>      int i = 0;
>      for (BlockLocation location : blockLocations)
> {         copyLocs[i++] = new BlockLocation(location);     }
>     return copyLocs;
>  }
>  



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