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https://issues.apache.org/jira/browse/HBASE-21162?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16607885#comment-16607885
 ] 

Hadoop QA commented on HBASE-21162:
-----------------------------------

| (/) *{color:green}+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: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} hbaseanti {color} | {color:green}  0m  
0s{color} | {color:green} Patch does not have any anti-patterns. {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:orange}-0{color} | {color:orange} test4tests {color} | {color:orange}  
0m  0s{color} | {color:orange} 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} branch-1 Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  6m 
29s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  3m 
23s{color} | {color:green} branch-1 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
46s{color} | {color:green} branch-1 passed with JDK v1.8.0_181 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
51s{color} | {color:green} branch-1 passed with JDK v1.7.0_191 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
33s{color} | {color:green} branch-1 passed {color} |
| {color:green}+1{color} | {color:green} shadedjars {color} | {color:green}  2m 
23s{color} | {color:green} branch has no errors when building our shaded 
downstream artifacts. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
41s{color} | {color:green} branch-1 passed with JDK v1.8.0_181 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
47s{color} | {color:green} branch-1 passed with JDK v1.7.0_191 {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
12s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m 
28s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
45s{color} | {color:green} the patch passed with JDK v1.8.0_181 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
45s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
51s{color} | {color:green} the patch passed with JDK v1.7.0_191 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
51s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
29s{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} shadedjars {color} | {color:green}  2m 
21s{color} | {color:green} patch has no errors when building our shaded 
downstream artifacts. {color} |
| {color:green}+1{color} | {color:green} hadoopcheck {color} | {color:green}  
1m 29s{color} | {color:green} Patch does not cause any errors with Hadoop 
2.7.4. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
37s{color} | {color:green} the patch passed with JDK v1.8.0_181 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
48s{color} | {color:green} the patch passed with JDK v1.7.0_191 {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  2m 
23s{color} | {color:green} hbase-common in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}133m 
52s{color} | {color:green} hbase-server in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
28s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}164m 32s{color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hbase:61288f8 |
| JIRA Issue | HBASE-21162 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12938926/HBASE-21162-branch-1.patch
 |
| Optional Tests |  asflicense  javac  javadoc  unit  findbugs  shadedjars  
hadoopcheck  hbaseanti  checkstyle  compile  |
| uname | Linux 0c6a083d3703 4.4.0-133-generic #159-Ubuntu SMP Fri Aug 10 
07:31:43 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | 
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build@2/component/dev-support/hbase-personality.sh
 |
| git revision | branch-1 / 6f4cbde |
| maven | version: Apache Maven 3.0.5 |
| Default Java | 1.7.0_191 |
| Multi-JDK versions |  /usr/lib/jvm/java-8-openjdk-amd64:1.8.0_181 
/usr/lib/jvm/java-7-openjdk-amd64:1.7.0_191 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HBASE-Build/14360/testReport/ |
| Max. process+thread count | 4705 (vs. ulimit of 10000) |
| modules | C: hbase-common hbase-server U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-HBASE-Build/14360/console |
| Powered by | Apache Yetus 0.7.0   http://yetus.apache.org |


This message was automatically generated.



> Revert suspicious change to BoundedByteBufferPool and disable use of direct 
> buffers for IPC reservoir by default
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-21162
>                 URL: https://issues.apache.org/jira/browse/HBASE-21162
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 1.4.7
>            Reporter: Andrew Purtell
>            Assignee: Andrew Purtell
>            Priority: Critical
>             Fix For: 1.5.0, 1.4.8
>
>         Attachments: HBASE-21162-branch-1.patch, HBASE-21162-branch-1.patch, 
> HBASE-21162-branch-1.patch
>
>
> We had a production incident where we traced the issue to a direct buffer 
> leak. On a hunch we tried setting hbase.ipc.server.reservoir.enabled = false 
> and after that no native memory leak could be observed in any regionserver 
> process under the triggering load. 
> On HBASE-19239 (Fix findbugs and error-prone issues) I made a change to 
> BoundedByteBufferPool that is suspicious given this finding. It was committed 
> to branch-1.4 and branch-1. I'm going to revert this change. 
> In addition the allocation of direct memory for the server RPC reservoir is a 
> bit problematic in that tracing native memory or direct buffer leaks to a 
> particular class or compilation unit is difficult, so I also propose 
> allocating the reservoir on the heap by default instead. Should there be a 
> leak it is much easier to do an analysis of a heap dump with familiar tools 
> to find it. 



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