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https://issues.apache.org/jira/browse/HBASE-16820?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15675968#comment-15675968
 ] 

Hadoop QA commented on HBASE-16820:
-----------------------------------

| (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 27s 
{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:red}-1{color} | {color:red} test4tests {color} | {color:red} 0m 0s 
{color} | {color:red} The patch doesn't appear to include any new or modified 
tests. Please justify why no new tests are needed for this patch. Also please 
list what manual steps were performed to verify this patch. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 8m 
2s {color} | {color:green} branch-1.1 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 33s 
{color} | {color:green} branch-1.1 passed with JDK v1.8.0_111 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 37s 
{color} | {color:green} branch-1.1 passed with JDK v1.7.0_80 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 
32s {color} | {color:green} branch-1.1 passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
23s {color} | {color:green} branch-1.1 passed {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red} 1m 48s 
{color} | {color:red} hbase-server in branch-1.1 has 80 extant Findbugs 
warnings. {color} |
| {color:red}-1{color} | {color:red} javadoc {color} | {color:red} 0m 33s 
{color} | {color:red} hbase-server in branch-1.1 failed with JDK v1.8.0_111. 
{color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 31s 
{color} | {color:green} branch-1.1 passed with JDK v1.7.0_80 {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m 
40s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 30s 
{color} | {color:green} the patch passed with JDK v1.8.0_111 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 30s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 34s 
{color} | {color:green} the patch passed with JDK v1.7.0_80 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 34s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 
21s {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} 
11m 52s {color} | {color:green} The 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 
14s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 2m 6s 
{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} javadoc {color} | {color:red} 0m 24s 
{color} | {color:red} hbase-server in the patch failed with JDK v1.8.0_111. 
{color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 32s 
{color} | {color:green} the patch passed with JDK v1.7.0_80 {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 88m 37s {color} 
| {color:red} hbase-server in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 
31s {color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 120m 33s {color} 
| {color:black} {color} |
\\
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|| Reason || Tests ||
| Failed junit tests | hadoop.hbase.regionserver.TestSplitWalDataLoss |
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|| Subsystem || Report/Notes ||
| Docker | Client=1.12.3 Server=1.12.3 Image:yetus/hbase:8012383 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12833147/HBASE-16820-branch-1.1-v0.patch
 |
| JIRA Issue | HBASE-16820 |
| Optional Tests |  asflicense  javac  javadoc  unit  findbugs  hadoopcheck  
hbaseanti  checkstyle  compile  |
| uname | Linux a2c91f751adf 3.13.0-93-generic #140-Ubuntu SMP Mon Jul 18 
21:21:05 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/hbase.sh |
| git revision | branch-1.1 / 7c58547 |
| Default Java | 1.7.0_80 |
| Multi-JDK versions |  /usr/lib/jvm/java-8-oracle:1.8.0_111 
/usr/lib/jvm/java-7-oracle:1.7.0_80 |
| findbugs | v3.0.0 |
| findbugs | 
https://builds.apache.org/job/PreCommit-HBASE-Build/4524/artifact/patchprocess/branch-findbugs-hbase-server-warnings.html
 |
| javadoc | 
https://builds.apache.org/job/PreCommit-HBASE-Build/4524/artifact/patchprocess/branch-javadoc-hbase-server-jdk1.8.0_111.txt
 |
| javadoc | 
https://builds.apache.org/job/PreCommit-HBASE-Build/4524/artifact/patchprocess/patch-javadoc-hbase-server-jdk1.8.0_111.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HBASE-Build/4524/artifact/patchprocess/patch-unit-hbase-server.txt
 |
| unit test logs |  
https://builds.apache.org/job/PreCommit-HBASE-Build/4524/artifact/patchprocess/patch-unit-hbase-server.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HBASE-Build/4524/testReport/ |
| modules | C: hbase-server U: hbase-server |
| Console output | 
https://builds.apache.org/job/PreCommit-HBASE-Build/4524/console |
| Powered by | Apache Yetus 0.3.0   http://yetus.apache.org |


This message was automatically generated.



> BulkLoad mvcc visibility only works accidentally 
> -------------------------------------------------
>
>                 Key: HBASE-16820
>                 URL: https://issues.apache.org/jira/browse/HBASE-16820
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 1.1.8
>            Reporter: Enis Soztutar
>            Assignee: Enis Soztutar
>            Priority: Blocker
>             Fix For: 1.1.8
>
>         Attachments: HBASE-16820-branch-1.1-v0.patch
>
>
> [~sergey.soldatov] has been debugging an issue with a 1.1 code base where the 
> commit for HBASE-16721 broke the bulk load visibility. After bulk load, the 
> bulk load files is not visible because the sequence id assigned to the bulk 
> load is not advanced in mvcc. 
> Debugging further, we have noticed that bulk load behavior is wrong, but it 
> works "accidentally" in all code bases (but broken in 1.1 after HBASE-16721). 
> Let me explain: 
>  - BL request can optionally request a flush before hand (this should be the 
> default) which causes the flush to happen with some sequenceId. The flush 
> sequence id is one past all the cells' sequenceids. This flush sequence id is 
> returned as a result to the flush operation. 
>  - BL then uses this particular sequenceId to mark the files, but itself does 
> not get a new sequenceid of its own, or advance the mvcc number. 
>  - BL completes WITHOUT making sure that the sequence id is visible. 
>  - BL itself though writes entries to the WAL for the BL event, which in 1.2 
> code bases goes through the whole mvcc + seqId paths, which makes sure that 
> earlier sequenceIds (the flush sequenceId) are visible via mvcc. 
> The problem with 1.1 is that the WAL entries only get sequence ids, but do 
> not touch mvcc. With the patch for HBASE-16721, we have made it so that the 
> flushedSequenceId is not used in mvcc as the highest read point (although all 
> the data is still visible).
> BL relying on the flush sequence id is wrong for two reasons: 
>  - BL files are loaded with the flush sequence id from the memstore. This 
> particular sequence id is used twice for two different things and ends up 
> being the sequence id for flushed file as well as BL'ed files. 
>  - BL should make sure that it gets a new sequence id and that sequence id is 
> visible before returning the results. 
> [~ndimiduk] FYI. 
>  



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