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https://issues.apache.org/jira/browse/PHOENIX-5998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17230339#comment-17230339
 ] 

Hadoop QA commented on PHOENIX-5998:
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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 
48s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} dupname {color} | {color:green}  0m  
0s{color} | {color:green} No case conflicting files found. {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 1 new or modified test 
files. {color} |
|| || || || {color:brown} 4.x Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  5m 
43s{color} | {color:green} 4.x passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
51s{color} | {color:green} 4.x passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
18s{color} | {color:green} 4.x passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
41s{color} | {color:green} 4.x passed {color} |
| {color:blue}0{color} | {color:blue} spotbugs {color} | {color:blue}  2m 
49s{color} | {color:blue} phoenix-core in 4.x has 946 extant spotbugs warnings. 
{color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  5m 
 8s{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 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
51s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red}  1m 
22s{color} | {color:red} phoenix-core: The patch generated 323 new + 1785 
unchanged - 230 fixed = 2108 total (was 2015) {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}  0m 
39s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} spotbugs {color} | {color:red}  3m  
2s{color} | {color:red} phoenix-core generated 1 new + 945 unchanged - 1 fixed 
= 946 total (was 946) {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red}128m 29s{color} 
| {color:red} phoenix-core in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
32s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}152m 57s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| FindBugs | module:phoenix-core |
|  |  Switch statement found in 
org.apache.phoenix.coprocessor.UngroupedAggregateRegionScanner.descRowKeyOrderUpgrade(List,
 ImmutableBytesWritable, UngroupedAggregateRegionObserver$MutationList) where 
default case is missing  At 
UngroupedAggregateRegionScanner.java:ImmutableBytesWritable, 
UngroupedAggregateRegionObserver$MutationList) where default case is missing  
At UngroupedAggregateRegionScanner.java:[lines 383-404] |
| Failed junit tests | phoenix.end2end.PointInTimeQueryIT |
|   | phoenix.end2end.IndexExtendedIT |
|   | phoenix.end2end.DeleteIT |
|   | phoenix.end2end.index.MutableIndexIT |
|   | phoenix.end2end.UpsertSelectIT |
|   | phoenix.util.IndexScrutinyIT |
|   | phoenix.end2end.join.SubqueryIT |
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|| Subsystem || Report/Notes ||
| Docker | ClientAPI=1.40 ServerAPI=1.40 base: 
https://ci-hadoop.apache.org/job/PreCommit-PHOENIX-Build/180/artifact/patchprocess/Dockerfile
 |
| JIRA Issue | PHOENIX-5998 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/13015104/PHOENIX-5998.4.x.005.patch
 |
| Optional Tests | dupname asflicense javac javadoc unit spotbugs hbaseanti 
checkstyle compile |
| uname | Linux ea1ae99d8585 4.15.0-60-generic #67-Ubuntu SMP Thu Aug 22 
16:55:30 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | dev/phoenix-personality.sh |
| git revision | 4.x / 565b0ea |
| Default Java | Private Build-1.8.0_242-8u242-b08-0ubuntu3~16.04-b08 |
| checkstyle | 
https://ci-hadoop.apache.org/job/PreCommit-PHOENIX-Build/180/artifact/patchprocess/diff-checkstyle-phoenix-core.txt
 |
| spotbugs | 
https://ci-hadoop.apache.org/job/PreCommit-PHOENIX-Build/180/artifact/patchprocess/new-spotbugs-phoenix-core.html
 |
| unit | 
https://ci-hadoop.apache.org/job/PreCommit-PHOENIX-Build/180/artifact/patchprocess/patch-unit-phoenix-core.txt
 |
|  Test Results | 
https://ci-hadoop.apache.org/job/PreCommit-PHOENIX-Build/180/testReport/ |
| Max. process+thread count | 6440 (vs. ulimit of 30000) |
| modules | C: phoenix-core U: phoenix-core |
| Console output | 
https://ci-hadoop.apache.org/job/PreCommit-PHOENIX-Build/180/console |
| versions | git=2.7.4 maven=3.3.9 spotbugs=4.1.3 |
| Powered by | Apache Yetus 0.12.0 https://yetus.apache.org |


This message was automatically generated.



> Paged server side ungrouped aggregate operations 
> -------------------------------------------------
>
>                 Key: PHOENIX-5998
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-5998
>             Project: Phoenix
>          Issue Type: Improvement
>            Reporter: Kadir OZDEMIR
>            Assignee: Kadir OZDEMIR
>            Priority: Major
>             Fix For: 4.16.0
>
>         Attachments: PHOENIX-5998.4.x.001.patch, PHOENIX-5998.4.x.002.patch, 
> PHOENIX-5998.4.x.003.patch, PHOENIX-5998.4.x.005.patch, 
> PHOENIX-5998.master.001.patch
>
>
> Phoenix provides the option of performing upsert select and delete query 
> operations on the client or server side.  This is decided by the Phoenix 
> optimizer based on configuration parameters. For the server side option, the 
> table operation (upsert select/delete query) is parallelized such that 
> multiple table regions are scanned and the mutations derived from these scans 
> can also be executed in parallel on the server side. However, currently there 
> is no paging capability and the server side operation can take long enough 
> lead to HBase client timeouts. When this happens, Phoenix can return failure 
> to its applications and the rest of the parallel scans and mutations on the 
> server side can still continue since  Phoenix has no mechanism in place to 
> stop these operations before returning failure to applications. This can 
> create unexpected race conditions between these left-over operations and the 
> new operations issued by applications. Putting a limit on the number of rows 
> to be processed within a single RPC call (i.e., the next operation on the 
> scanner) on the server side using a Phoenix level paging is highly desirable 
> and a required step to prevent the possible race conditions. This paging 
> mechanism has been already implemented for index rebuild and verification 
> operations and proven to be effective to prevent timeouts. This paging can be 
> implemented for all server side operations including aggregates, upsert 
> selects, delete queries and so on.



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