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https://issues.apache.org/jira/browse/HBASE-18715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16150133#comment-16150133
 ] 

Hadoop QA commented on HBASE-18715:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 
18s{color} | {color:blue} Docker mode activated. {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:green}+1{color} | {color:green} test4tests {color} | {color:green}  0m 
 0s{color} | {color:green} The patch appears to include 5 new or modified test 
files. {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
36s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  3m 
47s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
28s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
40s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 
58s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  3m 
38s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
16s{color} | {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
19s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:red}-1{color} | {color:red} mvninstall {color} | {color:red}  0m 
15s{color} | {color:red} hbase-examples in the patch failed. {color} |
| {color:red}-1{color} | {color:red} compile {color} | {color:red}  0m 
15s{color} | {color:red} hbase-examples in the patch failed. {color} |
| {color:red}-1{color} | {color:red} javac {color} | {color:red}  0m 15s{color} 
| {color:red} hbase-examples in the patch failed. {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
39s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 
59s{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:red}-1{color} | {color:red} hadoopcheck {color} | {color:red}  2m 
10s{color} | {color:red} The patch causes 22 errors with Hadoop v2.6.1. {color} 
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| {color:red}-1{color} | {color:red} hadoopcheck {color} | {color:red}  4m 
22s{color} | {color:red} The patch causes 22 errors with Hadoop v2.6.2. {color} 
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| {color:red}-1{color} | {color:red} hadoopcheck {color} | {color:red}  6m 
33s{color} | {color:red} The patch causes 22 errors with Hadoop v2.6.3. {color} 
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| {color:red}-1{color} | {color:red} hadoopcheck {color} | {color:red}  8m 
44s{color} | {color:red} The patch causes 22 errors with Hadoop v2.6.4. {color} 
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| {color:red}-1{color} | {color:red} hadoopcheck {color} | {color:red} 10m 
56s{color} | {color:red} The patch causes 22 errors with Hadoop v2.6.5. {color} 
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| {color:red}-1{color} | {color:red} hadoopcheck {color} | {color:red} 13m  
5s{color} | {color:red} The patch causes 22 errors with Hadoop v2.7.1. {color} |
| {color:red}-1{color} | {color:red} hadoopcheck {color} | {color:red} 15m 
15s{color} | {color:red} The patch causes 22 errors with Hadoop v2.7.2. {color} 
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| {color:red}-1{color} | {color:red} hadoopcheck {color} | {color:red} 17m 
25s{color} | {color:red} The patch causes 22 errors with Hadoop v2.7.3. {color} 
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| {color:red}-1{color} | {color:red} hadoopcheck {color} | {color:red} 19m 
36s{color} | {color:red} The patch causes 22 errors with Hadoop v3.0.0-alpha4. 
{color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red}  0m 
14s{color} | {color:red} hbase-examples in the patch failed. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
17s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  2m 
18s{color} | {color:green} hbase-common in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  0m 
23s{color} | {color:green} hbase-hadoop-compat in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  0m 
27s{color} | {color:green} hbase-hadoop2-compat in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}110m  9s{color} 
| {color:red} hbase-server in the patch failed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}  0m 21s{color} 
| {color:red} hbase-examples in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  1m 
 6s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}160m 36s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.hbase.io.hfile.TestScannerFromBucketCache |
|   | hadoop.hbase.regionserver.TestBlocksRead |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.03.0-ce Server=17.03.0-ce Image:yetus/hbase:47a5614 |
| JIRA Issue | HBASE-18715 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12884865/HBASE-18715-master-v2.patch
 |
| Optional Tests |  asflicense  javac  javadoc  unit  findbugs  hadoopcheck  
hbaseanti  checkstyle  compile  |
| uname | Linux 1edf60577b54 3.13.0-119-generic #166-Ubuntu SMP Wed May 3 
12:18:55 UTC 2017 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 / 8a800c3 |
| Default Java | 1.8.0_144 |
| findbugs | v3.1.0-RC3 |
| mvninstall | 
https://builds.apache.org/job/PreCommit-HBASE-Build/8421/artifact/patchprocess/patch-mvninstall-hbase-examples.txt
 |
| compile | 
https://builds.apache.org/job/PreCommit-HBASE-Build/8421/artifact/patchprocess/patch-compile-hbase-examples.txt
 |
| javac | 
https://builds.apache.org/job/PreCommit-HBASE-Build/8421/artifact/patchprocess/patch-compile-hbase-examples.txt
 |
| findbugs | 
https://builds.apache.org/job/PreCommit-HBASE-Build/8421/artifact/patchprocess/patch-findbugs-hbase-examples.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HBASE-Build/8421/artifact/patchprocess/patch-unit-hbase-server.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HBASE-Build/8421/artifact/patchprocess/patch-unit-hbase-examples.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HBASE-Build/8421/testReport/ |
| modules | C: hbase-common hbase-hadoop-compat hbase-hadoop2-compat 
hbase-server hbase-examples U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-HBASE-Build/8421/console |
| Powered by | Apache Yetus 0.4.0   http://yetus.apache.org |


This message was automatically generated.



> isolate large query
> -------------------
>
>                 Key: HBASE-18715
>                 URL: https://issues.apache.org/jira/browse/HBASE-18715
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: chenxu
>            Assignee: chenxu
>         Attachments: HBASE-18715-master-v1.patch, 
> HBASE-18715-master-v2.patch, isolate result.png
>
>
> large queries are very expensive than the general operation, and often delay 
> insensitive.
> if not isolate, Handlers may be all used by the large query,
> lead to _Put_ or _Get_ slowly, so there need be an mechanism to isolate the 
> large query.
> for example we can use a separate _RpcExecutor_ to handle this.
> for the following type of queries we can think it is a large query:
> (1) _Scan_ has no startkey or endkey
> (2) Client call _ResultScanner.next()_ more than a certain threshold
> (3) Client call custom coprocessor which involves large queries(such as 
> _AggregateService_)
> for large queries, RegionServer should meet the following requirements
> (1) dynamic configure if isolate large query is turn on
> (2) setup certain Handlers to deal with large queries only
> (3) in offpeak hours, large queries are not isolate
> (4) dynamic configure if cache Blocks is turn on if the query is a large query



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