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https://issues.apache.org/jira/browse/HBASE-18042?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16023178#comment-16023178
 ] 

Hadoop QA commented on HBASE-18042:
-----------------------------------

| (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 2 new or modified test 
files. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 3m 
22s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 39s 
{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 
52s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
16s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 2m 5s 
{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 31s 
{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m 
50s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 42s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 42s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 
50s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
15s {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} hadoopcheck {color} | {color:green} 
30m 48s {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-alpha2. {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red} 2m 21s 
{color} | {color:red} hbase-server generated 1 new + 0 unchanged - 0 fixed = 1 
total (was 0) {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 33s 
{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 117m 47s 
{color} | {color:red} hbase-server in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 
19s {color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 162m 50s {color} 
| {color:black} {color} |
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|| Reason || Tests ||
| FindBugs | module:hbase-server |
|  |  Exception is caught when Exception is not thrown in 
org.apache.hadoop.hbase.regionserver.RSRpcServices.scan(RpcController, 
ClientProtos$ScanRequest)  At RSRpcServices.java:is not thrown in 
org.apache.hadoop.hbase.regionserver.RSRpcServices.scan(RpcController, 
ClientProtos$ScanRequest)  At RSRpcServices.java:[line 3298] |
| Failed junit tests | hadoop.hbase.client.TestLeaseRenewal |
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|| Subsystem || Report/Notes ||
| Docker | Client=1.12.3 Server=1.12.3 Image:yetus/hbase:757bf37 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12869658/HBASE-18042-v1.patch |
| JIRA Issue | HBASE-18042 |
| Optional Tests |  asflicense  javac  javadoc  unit  findbugs  hadoopcheck  
hbaseanti  checkstyle  compile  |
| uname | Linux 3c322a270931 3.13.0-106-generic #153-Ubuntu SMP Tue Dec 6 
15:44:32 UTC 2016 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 / 64c7017 |
| Default Java | 1.8.0_131 |
| findbugs | v3.0.0 |
| findbugs | 
https://builds.apache.org/job/PreCommit-HBASE-Build/6925/artifact/patchprocess/new-findbugs-hbase-server.html
 |
| unit | 
https://builds.apache.org/job/PreCommit-HBASE-Build/6925/artifact/patchprocess/patch-unit-hbase-server.txt
 |
| unit test logs |  
https://builds.apache.org/job/PreCommit-HBASE-Build/6925/artifact/patchprocess/patch-unit-hbase-server.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HBASE-Build/6925/testReport/ |
| modules | C: hbase-server U: hbase-server |
| Console output | 
https://builds.apache.org/job/PreCommit-HBASE-Build/6925/console |
| Powered by | Apache Yetus 0.3.0   http://yetus.apache.org |


This message was automatically generated.



> Client Compatibility breaks between versions 1.2 and 1.3
> --------------------------------------------------------
>
>                 Key: HBASE-18042
>                 URL: https://issues.apache.org/jira/browse/HBASE-18042
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver, scan
>    Affects Versions: 2.0.0, 1.4.0, 1.3.1
>            Reporter: Karan Mehta
>            Assignee: Duo Zhang
>            Priority: Critical
>             Fix For: 2.0.0, 1.4.0, 1.3.2
>
>         Attachments: HBASE-18042-branch-1.patch, HBASE-18042-branch-1.patch, 
> HBASE-18042.patch, HBASE-18042-v1.patch
>
>
> OpenTSDB uses AsyncHBase as its client, rather than using the traditional 
> HBase Client. From version 1.2 to 1.3, the {{ClientProtos}} have been 
> changed. Newer fields are added to {{ScanResponse}} proto.
> For a typical Scan request in 1.2, would require caller to make an 
> OpenScanner Request, GetNextRows Request and a CloseScanner Request, based on 
> {{more_rows}} boolean field in the {{ScanResponse}} proto.
> However, from 1.3, new parameter {{more_results_in_region}} was added, which 
> limits the results per region. Therefore the client has to now manage sending 
> all the requests for each region. Further more, if the results are exhausted 
> from a particular region, the {{ScanResponse}} will set 
> {{more_results_in_region}} to false, but {{more_results}} can still be true. 
> Whenever the former is set to false, the {{RegionScanner}} will also be 
> closed. 
> OpenTSDB makes an OpenScanner Request and receives all its results in the 
> first {{ScanResponse}} itself, thus creating a condition as described in 
> above paragraph. Since {{more_rows}} is true, it will proceed to send next 
> request at which point the {{RSRpcServices}} will throw 
> {{UnknownScannerException}}. The protobuf client compatibility is maintained 
> but expected behavior is modified.



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