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https://issues.apache.org/jira/browse/HIVE-18837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16384324#comment-16384324
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Hive QA commented on HIVE-18837:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
|| || || || {color:brown} Prechecks {color} ||
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue}  0m  
0s{color} | {color:blue} Findbugs executables are not available. {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:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
31s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  6m 
51s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
38s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
 9s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
23s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m  
8s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:red}-1{color} | {color:red} mvninstall {color} | {color:red}  0m 
18s{color} | {color:red} llap-server in the patch failed. {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
34s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  1m 
34s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red}  0m 
14s{color} | {color:red} llap-server: The patch generated 4 new + 177 unchanged 
- 5 fixed = 181 total (was 182) {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red}  0m 
39s{color} | {color:red} ql: The patch generated 1 new + 118 unchanged - 0 
fixed = 119 total (was 118) {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} javadoc {color} | {color:green}  1m 
24s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} asflicense {color} | {color:red}  0m 
16s{color} | {color:red} The patch generated 49 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 18m 29s{color} | 
{color:black} {color} |
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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-9447/dev-support/hive-personality.sh
 |
| git revision | master / a4198f5 |
| Default Java | 1.8.0_111 |
| mvninstall | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-9447/yetus/patch-mvninstall-llap-server.txt
 |
| checkstyle | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-9447/yetus/diff-checkstyle-llap-server.txt
 |
| checkstyle | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-9447/yetus/diff-checkstyle-ql.txt
 |
| asflicense | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-9447/yetus/patch-asflicense-problems.txt
 |
| modules | C: common llap-server ql U: . |
| Console output | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-9447/yetus.txt |
| Powered by | Apache Yetus    http://yetus.apache.org |


This message was automatically generated.



> add a flag and disable some object pools in LLAP until further testing
> ----------------------------------------------------------------------
>
>                 Key: HIVE-18837
>                 URL: https://issues.apache.org/jira/browse/HIVE-18837
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>            Priority: Major
>         Attachments: HIVE-18837.patch
>
>
> There appears to be some subtle concurrency issue in FixedSizedObjectPool 
> that happens with multiple consumers where some object may be retrieved 
> twice. 
> Unfortunately running a load test for hour(s) does not trigger it for me and 
> overall it happens extremely rarely on non-specific tests; adding debug info 
> at this level is a little bit difficult to determine how it could have 
> happened and interlocked operations in the trace may actually eliminate the 
> issue. I suspect it has something to do with aggressive assumptions made for 
> locking and array elements and the memory model. Maybe that can be simplified 
> without much perf loss.
> Anyway, for now we will disable the pools where multiple consumers use them.
> Need to test perf to see if these two pools even matter; if so, we can 
> simplify the model as per above or debug the issue in some way.



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