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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-14035) Reduce fair call queue backoff's impact on clients
Date Tue, 06 Jun 2017 16:42:18 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-14035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16039225#comment-16039225
] 

Hadoop QA commented on HADOOP-14035:
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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} 12m 58s{color} | {color:blue}
Docker mode activated. {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 3 new or modified test files. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  6m 50s{color}
| {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  5m 40s{color} |
{color:green} branch-2 passed with JDK v1.8.0_131 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  6m 39s{color} |
{color:green} branch-2 passed with JDK v1.7.0_131 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 30s{color}
| {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 59s{color} |
{color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m 48s{color} |
{color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 42s{color} |
{color:green} branch-2 passed with JDK v1.8.0_131 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 53s{color} |
{color:green} branch-2 passed with JDK v1.7.0_131 {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 41s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  5m 46s{color} |
{color:green} the patch passed with JDK v1.8.0_131 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  5m 46s{color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  6m 56s{color} |
{color:green} the patch passed with JDK v1.7.0_131 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  6m 56s{color} | {color:green}
the patch passed {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  0m 29s{color}
| {color:orange} hadoop-common-project/hadoop-common: The patch generated 2 new + 295 unchanged
- 1 fixed = 297 total (was 296) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m  0s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m  1s{color}
| {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  2m  5s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 44s{color} |
{color:green} the patch passed with JDK v1.8.0_131 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 53s{color} |
{color:green} the patch passed with JDK v1.7.0_131 {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  7m 48s{color} | {color:green}
hadoop-common in the patch passed with JDK v1.7.0_131. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 23s{color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 73m 33s{color} | {color:black}
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:5e40efe |
| JIRA Issue | HADOOP-14035 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12871620/HADOOP-14035.branch-2.patch
|
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  unit  findbugs
 checkstyle  |
| uname | Linux cf1b1265381f 3.13.0-116-generic #163-Ubuntu SMP Fri Mar 31 14:13:22 UTC 2017
x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh |
| git revision | branch-2 / e889c82 |
| Default Java | 1.7.0_131 |
| Multi-JDK versions |  /usr/lib/jvm/java-8-oracle:1.8.0_131 /usr/lib/jvm/java-7-openjdk-amd64:1.7.0_131
|
| findbugs | v3.0.0 |
| checkstyle | https://builds.apache.org/job/PreCommit-HADOOP-Build/12453/artifact/patchprocess/diff-checkstyle-hadoop-common-project_hadoop-common.txt
|
| JDK v1.7.0_131  Test Results | https://builds.apache.org/job/PreCommit-HADOOP-Build/12453/testReport/
|
| modules | C: hadoop-common-project/hadoop-common U: hadoop-common-project/hadoop-common
|
| Console output | https://builds.apache.org/job/PreCommit-HADOOP-Build/12453/console |
| Powered by | Apache Yetus 0.5.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Reduce fair call queue backoff's impact on clients
> --------------------------------------------------
>
>                 Key: HADOOP-14035
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14035
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: ipc
>    Affects Versions: 2.7.0
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>         Attachments: HADOOP-14035.branch-2.patch, HADOOP-14035.patch
>
>
> When fcq backoff is enabled and an abusive client overflows the call queue, its connection
is closed, as well as subsequent good client connections.   Disconnects are very disruptive,
esp. to multi-threaded clients with multiple outstanding requests, or clients w/o a retry
proxy (ex. datanodes).
> Until the abusive user is downgraded to a lower priority queue, disconnect/reconnect
mayhem occurs which significantly degrades performance.  Server metrics look good despite
horrible client latency.
> The fcq should utilize selective ipc disconnects to avoid pushback disconnecting good
clients.



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