[ 
https://issues.apache.org/jira/browse/HIVE-19578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16479161#comment-16479161
 ] 

Hive QA commented on HIVE-19578:
--------------------------------

| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
|| || || || {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:brown} master Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  7m 
28s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
43s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
17s{color} | {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue}  3m  
0s{color} | {color:blue} standalone-metastore in master has 215 extant Findbugs 
warnings. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
10s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
50s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
41s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
41s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
18s{color} | {color:green} standalone-metastore: The patch generated 0 new + 21 
unchanged - 2 fixed = 21 total (was 23) {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m 
 0s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red}  3m 
14s{color} | {color:red} standalone-metastore generated 1 new + 214 unchanged - 
1 fixed = 215 total (was 215) {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
25s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
12s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 19m 44s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| FindBugs | module:standalone-metastore |
|  |  Unsigned right shift cast to short/byte in 
org.apache.hadoop.hive.common.ndv.hll.HLLSparseRegister.add(long)  At 
HLLSparseRegister.java:short/byte in 
org.apache.hadoop.hive.common.ndv.hll.HLLSparseRegister.add(long)  At 
HLLSparseRegister.java:[line 57] |
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|| Subsystem || Report/Notes ||
| Optional Tests |  asflicense  javac  javadoc  findbugs  checkstyle  compile  |
| uname | Linux hiveptest-server-upstream 3.16.0-4-amd64 #1 SMP Debian 
3.16.36-1+deb8u1 (2016-09-03) x86_64 GNU/Linux |
| Build tool | maven |
| Personality | 
/data/hiveptest/working/yetus_PreCommit-HIVE-Build-11028/dev-support/hive-personality.sh
 |
| git revision | master / b329afa |
| Default Java | 1.8.0_111 |
| findbugs | v3.0.0 |
| findbugs | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-11028/yetus/new-findbugs-standalone-metastore.html
 |
| modules | C: standalone-metastore U: standalone-metastore |
| Console output | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-11028/yetus.txt |
| Powered by | Apache Yetus    http://yetus.apache.org |


This message was automatically generated.



> HLL merges tempList on every add
> --------------------------------
>
>                 Key: HIVE-19578
>                 URL: https://issues.apache.org/jira/browse/HIVE-19578
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Sergey Shelukhin
>            Assignee: Prasanth Jayachandran
>            Priority: Major
>         Attachments: HIVE-19578.1.patch, Screen Shot 2018-05-16 at 15.29.12 
> .png
>
>
>  See comments on HIVE-18866; this has significant perf overhead after the 
> even bigger overhead from hashing is removed.  !Screen Shot 2018-05-16 at 
> 15.29.12 .png!



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