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Date: Mon, 6 Mar 2017 15:24:32 +0000 (UTC)
From: "Hadoop QA (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.13047211.1488352843000.7500.1488813872938@Atlassian.JIRA>
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References: <JIRA.13047211.1488352843000@Atlassian.JIRA> <JIRA.13047211.1488352843999@jira-lw-us.apache.org>
Subject: [jira] [Commented] (HBASE-17712) Remove/Simplify the logic of
 RegionScannerImpl.handleFileNotFound
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archived-at: Mon, 06 Mar 2017 15:24:43 -0000


    [ https://issues.apache.org/jira/browse/HBASE-17712?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15897471#comment-15897471 ] 

Hadoop QA commented on HBASE-17712:
-----------------------------------

| (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 21s {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 4 new or modified test files. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 3m 1s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 37s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 46s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 14s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m 43s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 27s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m 42s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 38s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 38s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 48s {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} 27m 14s {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:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m 50s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 27s {color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 95m 58s {color} | {color:red} hbase-server in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 15s {color} | {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 135m 37s {color} | {color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker | Client=1.12.3 Server=1.12.3 Image:yetus/hbase:8d52d23 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12856267/HBASE-17712-v3.patch |
| JIRA Issue | HBASE-17712 |
| Optional Tests |  asflicense  javac  javadoc  unit  findbugs  hadoopcheck  hbaseanti  checkstyle  compile  |
| uname | Linux 7c9709d2d23b 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 / d2349c6 |
| Default Java | 1.8.0_121 |
| findbugs | v3.0.0 |
| unit | https://builds.apache.org/job/PreCommit-HBASE-Build/5963/artifact/patchprocess/patch-unit-hbase-server.txt |
|  Test Results | https://builds.apache.org/job/PreCommit-HBASE-Build/5963/testReport/ |
| modules | C: hbase-server U: hbase-server |
| Console output | https://builds.apache.org/job/PreCommit-HBASE-Build/5963/console |
| Powered by | Apache Yetus 0.3.0   http://yetus.apache.org |


This message was automatically generated.


> Remove/Simplify the logic of RegionScannerImpl.handleFileNotFound
> -----------------------------------------------------------------
>
>                 Key: HBASE-17712
>                 URL: https://issues.apache.org/jira/browse/HBASE-17712
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 2.0.0, 1.4.0
>            Reporter: Duo Zhang
>            Assignee: Duo Zhang
>             Fix For: 2.0.0, 1.4.0
>
>         Attachments: HBASE-17712.patch, HBASE-17712-ut.patch, HBASE-17712-v1.patch, HBASE-17712-v2.patch, HBASE-17712-v3.patch
>
>
> It is introduced in HBASE-13651 and the logic became much more complicated after HBASE-16304 due to a dead lock issue. It is really tough as sequence id is involved in and the method we called is used to serve secondary replica originally which does not handle write.
> In fact, in 1.x release, the problem described in HBASE-13651 is gone. Now we will write a compaction marker to WAL before deleting the compacted files. We can only consider a RS as dead after its WAL files are all closed so if the region has already been reassigned the compaction will fail as we can not write out the compaction marker.
> So theoretically, if we still hit FileNotFound exception, it should be a critical bug which means we may loss data. I do not think it is a good idea to just eat the exception and refresh store files. Or even if we want to do this, we can just refresh store files without dropping memstore contents. This will also simplify the logic a lot.
> Suggestions are welcomed.


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