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https://issues.apache.org/jira/browse/HBASE-19160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16239661#comment-16239661
 ] 

Hadoop QA commented on HBASE-19160:
-----------------------------------

| (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 
12s{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:green}+1{color} | {color:green} test4tests {color} | {color:green}  0m 
 0s{color} | {color:green} The patch appears to include 14 new or modified test 
files. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
11s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  4m 
46s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  2m 
53s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  2m 
59s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} shadedjars {color} | {color:green}  7m 
31s{color} | {color:green} branch has no errors when building our shaded 
downstream artifacts. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
36s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} scaladoc {color} | {color:green}  1m 
31s{color} | {color:green} master passed {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}  4m 
23s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  2m 
50s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  2m 
50s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} scalac {color} | {color:green}  2m 
50s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red}  0m 
25s{color} | {color:red} hbase-common: The patch generated 1 new + 213 
unchanged - 1 fixed = 214 total (was 214) {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red}  0m 
27s{color} | {color:red} hbase-client: The patch generated 3 new + 49 unchanged 
- 3 fixed = 52 total (was 52) {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red}  1m 
17s{color} | {color:red} hbase-server: The patch generated 9 new + 956 
unchanged - 11 fixed = 965 total (was 967) {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red}  0m 
17s{color} | {color:red} hbase-mapreduce: The patch generated 1 new + 48 
unchanged - 1 fixed = 49 total (was 49) {color} |
| {color:red}-1{color} | {color:red} whitespace {color} | {color:red}  0m  
0s{color} | {color:red} The patch has 867 line(s) that end in whitespace. Use 
git apply --whitespace=fix <<patch_file>>. Refer 
https://git-scm.com/docs/git-apply {color} |
| {color:red}-1{color} | {color:red} whitespace {color} | {color:red}  0m 
31s{color} | {color:red} The patch 384 line(s) with tabs. {color} |
| {color:green}+1{color} | {color:green} shadedjars {color} | {color:green}  5m 
23s{color} | {color:green} patch has no errors when building our shaded 
downstream artifacts. {color} |
| {color:green}+1{color} | {color:green} hadoopcheck {color} | {color:green} 
45m 44s{color} | {color:green} Patch does not cause any errors with Hadoop 
2.6.1 2.6.2 2.6.3 2.6.4 2.6.5 2.7.1 2.7.2 2.7.3 or 3.0.0-alpha4. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
38s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} scaladoc {color} | {color:green}  1m 
30s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  2m 
14s{color} | {color:green} hbase-common in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  2m 
35s{color} | {color:green} hbase-client in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 90m 
30s{color} | {color:green} hbase-server in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 10m 
59s{color} | {color:green} hbase-mapreduce in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  0m 
33s{color} | {color:green} hbase-it in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  4m  
4s{color} | {color:green} hbase-spark in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  1m 
54s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}191m 29s{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:eee3b01 |
| JIRA Issue | HBASE-19160 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12896132/HBASE-19160.v4.patch |
| Optional Tests |  asflicense  javac  javadoc  unit  findbugs  shadedjars  
hadoopcheck  hbaseanti  checkstyle  compile  scalac  scaladoc  |
| uname | Linux 73362b3d99ae 3.13.0-129-generic #178-Ubuntu SMP Fri Aug 11 
12:48:20 UTC 2017 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 / 28cdf4afb8 |
| maven | version: Apache Maven 3.5.2 
(138edd61fd100ec658bfa2d307c43b76940a5d7d; 2017-10-18T07:58:13Z) |
| Default Java | 1.8.0_151 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-HBASE-Build/9637/artifact/patchprocess/diff-checkstyle-hbase-common.txt
 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-HBASE-Build/9637/artifact/patchprocess/diff-checkstyle-hbase-client.txt
 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-HBASE-Build/9637/artifact/patchprocess/diff-checkstyle-hbase-server.txt
 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-HBASE-Build/9637/artifact/patchprocess/diff-checkstyle-hbase-mapreduce.txt
 |
| whitespace | 
https://builds.apache.org/job/PreCommit-HBASE-Build/9637/artifact/patchprocess/whitespace-eol.txt
 |
| whitespace | 
https://builds.apache.org/job/PreCommit-HBASE-Build/9637/artifact/patchprocess/whitespace-tabs.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HBASE-Build/9637/testReport/ |
| modules | C: hbase-common hbase-client hbase-server hbase-mapreduce hbase-it 
hbase-spark U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-HBASE-Build/9637/console |
| Powered by | Apache Yetus 0.6.0   http://yetus.apache.org |


This message was automatically generated.



> Re-expose CellComparator
> ------------------------
>
>                 Key: HBASE-19160
>                 URL: https://issues.apache.org/jira/browse/HBASE-19160
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 2.0.0-alpha-4
>            Reporter: Mike Drob
>            Assignee: Mike Drob
>            Priority: Critical
>             Fix For: 2.0.0-beta-1
>
>         Attachments: HBASE-19160.patch, HBASE-19160.v2.patch, 
> HBASE-19160.v3.patch, HBASE-19160.v4.patch
>
>
> On HBASE-18995 we moved a bunch of public methods to Private places. This 
> inadvertently breaks donwstream consumers. Let's see if we can ease up on 
> some of the lockdown and make life easier for them.
> Copying [~ram_krish]'s previous analysis:
> {quote}
> I read the Crunch projec't hbase-support related code. 
> -> It uses both CellUtil (Public exposed) and KeyValueUtil (@Private) classes 
> for helper methods.
> -> All methods in CellUtil that are getting used are even now exposed in 
> branch-2's CellUtil and they are very common helper methods. So we are safe 
> here.
> -> Wrt KeyValueUtil the API is createFirstOnRow(). It is used in test cases 
> and in some core code. In most of the places they are trying to create the 
> splitKeys from the region's start keys and that is also getting persisted. I 
> think here they can safely create a cell out of the given byte[] of the row.
> But there is one place where they are trying to do some scanning on a 
> HFileScanner directly (@Private) scanner. So this should be changed because 
> it is an internal interface for us. And on this scanner they have copied our 
> seekTo() code into their source files for some scanning purpose. In this code 
> they are actually using the KvUtil.createFirstOnRow() to seek to that first 
> cell of that row.
> More over I think in branch-2 we are restricting even CPs from accessing some 
> of our internal scanners and they can only use InternalScanner interface. So 
> this code in crunch needs heavy refactoring to work with branch-2 in case 
> they want to fit into the Public/Private exposed semantics that HBase 
> presents to the downstreamers.
> -> If still they want some APIs like this we can expose 
> CellUtil#createFirstOnRow, createLastOnRow, createFirstOnCol and 
> createLastOnCol at the maximum. I think others are not useful and are more 
> internal stuffs.
> {quote}



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