[
https://issues.apache.org/jira/browse/HBASE-16388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15473734#comment-15473734
]
Hadoop QA commented on HBASE-16388:
-----------------------------------
| (/) *{color:green}+1 overall{color}* |
\\
\\
|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 13s
{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 1 new or modified test
files. {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 10s
{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 3m
9s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 59s
{color} | {color:green} master passed with JDK v1.8.0_101 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m 10s
{color} | {color:green} master passed with JDK v1.7.0_111 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 1m
7s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m
38s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 3m
39s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 54s
{color} | {color:green} master passed with JDK v1.8.0_101 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 13s
{color} | {color:green} master passed with JDK v1.7.0_111 {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
23s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 58s
{color} | {color:green} the patch passed with JDK v1.8.0_101 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 58s
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m 9s
{color} | {color:green} the patch passed with JDK v1.7.0_111 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 1m 9s
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 1m
8s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m
38s {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} xml {color} | {color:green} 0m 0s
{color} | {color:green} The patch has no ill-formed XML file. {color} |
| {color:green}+1{color} | {color:green} hadoopcheck {color} | {color:green}
27m 36s {color} | {color:green} Patch does not cause any errors with Hadoop
2.4.0 2.4.1 2.5.0 2.5.1 2.5.2 2.6.1 2.6.2 2.6.3 2.7.1. {color} |
| {color:green}+1{color} | {color:green} hbaseprotoc {color} | {color:green} 0m
36s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 4m
20s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 54s
{color} | {color:green} the patch passed with JDK v1.8.0_101 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 12s
{color} | {color:green} the patch passed with JDK v1.7.0_111 {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 1m 47s
{color} | {color:green} hbase-common in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 1m 0s
{color} | {color:green} hbase-client in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 91m 25s
{color} | {color:green} hbase-server in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
51s {color} | {color:green} The patch does not generate ASF License warnings.
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 149m 22s {color}
| {color:black} {color} |
\\
\\
|| Subsystem || Report/Notes ||
| Docker | Client=1.11.2 Server=1.11.2 Image:yetus/hbase:date2016-09-08 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12827532/HBASE-16388-v2.patch |
| JIRA Issue | HBASE-16388 |
| Optional Tests | asflicense javac javadoc unit findbugs hadoopcheck
hbaseanti checkstyle compile xml |
| uname | Linux c81dd854dba3 3.13.0-36-lowlatency #63-Ubuntu SMP PREEMPT Wed
Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality |
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/component/dev-support/hbase-personality.sh
|
| git revision | master / fc224ed |
| Default Java | 1.7.0_111 |
| Multi-JDK versions | /usr/lib/jvm/java-8-oracle:1.8.0_101
/usr/lib/jvm/java-7-openjdk-amd64:1.7.0_111 |
| findbugs | v3.0.0 |
| Test Results |
https://builds.apache.org/job/PreCommit-HBASE-Build/3458/testReport/ |
| modules | C: hbase-common hbase-client hbase-server U: . |
| Console output |
https://builds.apache.org/job/PreCommit-HBASE-Build/3458/console |
| Powered by | Apache Yetus 0.3.0 http://yetus.apache.org |
This message was automatically generated.
> Prevent client threads being blocked by only one slow region server
> -------------------------------------------------------------------
>
> Key: HBASE-16388
> URL: https://issues.apache.org/jira/browse/HBASE-16388
> Project: HBase
> Issue Type: New Feature
> Reporter: Phil Yang
> Assignee: Phil Yang
> Attachments: HBASE-16388-branch-1-v1.patch, HBASE-16388-v1.patch,
> HBASE-16388-v2.patch, HBASE-16388-v2.patch, HBASE-16388-v2.patch,
> HBASE-16388-v2.patch
>
>
> It is a general use case for HBase's users that they have several
> threads/handlers in their service, and each handler has its own Table/HTable
> instance. Generally users think each handler is independent and won't
> interact each other.
> However, in an extreme case, if a region server is very slow, every requests
> to this RS will timeout, handlers of users' service may be occupied by the
> long-waiting requests even requests belong to other RS will also be timeout.
> For example:
> If we have 100 handlers in a client service(timeout is 1000ms) and HBase has
> 10 region servers whose average response time is 50ms. If no region server is
> slow, we can handle 2000 requests per second.
> Now this service's QPS is 1000. If there is one region server very slow and
> all requests to it will be timeout. Users hope that only 10% requests failed,
> and 90% requests' response time is still 50ms, because only 10% requests are
> located to the slow RS. However, each second we have 100 long-waiting
> requests which exactly occupies all 100 handles. So all handlers is blocked,
> the availability of this service is almost zero.
> To prevent this case, we can limit the max concurrent requests to one RS in
> process-level. Requests exceeding the limit will throws
> ServerBusyException(extends DoNotRetryIOE) immediately to users. In the above
> case, if we set this limit to 20, only 20 handlers will be occupied and other
> 80 handlers can still handle requests to other RS. The availability of this
> service is 90% as expected.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
