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https://issues.apache.org/jira/browse/HDFS-11361?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15935456#comment-15935456
 ] 

Hadoop QA commented on HDFS-11361:
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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}  2m 
33s{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: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:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
46s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 16m 
 4s{color} | {color:green} HDFS-7240 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
38s{color} | {color:green} HDFS-7240 passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
43s{color} | {color:green} HDFS-7240 passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 
34s{color} | {color:green} HDFS-7240 passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 
26s{color} | {color:green} HDFS-7240 passed {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red}  1m 
42s{color} | {color:red} hadoop-hdfs-project/hadoop-hdfs-client in HDFS-7240 
has 90 extant Findbugs warnings. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
24s{color} | {color:green} HDFS-7240 passed {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
18s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m 
22s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
26s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  1m 
26s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
40s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 
25s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 
21s{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} xml {color} | {color:green}  0m  
1s{color} | {color:green} The patch has no ill-formed XML file. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  3m 
45s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} javadoc {color} | {color:red}  0m 
47s{color} | {color:red} hadoop-hdfs-project_hadoop-hdfs generated 3 new + 7 
unchanged - 0 fixed = 10 total (was 7) {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  0m 
57s{color} | {color:green} hadoop-hdfs-client in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 92m 55s{color} 
| {color:red} hadoop-hdfs 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}135m 12s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | 
hadoop.hdfs.server.datanode.TestDataNodeVolumeFailureReporting |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:a9ad5d6 |
| JIRA Issue | HDFS-11361 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12859783/HDFS-11361-HDFS-7240.005.patch
 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  findbugs  checkstyle  xml  |
| uname | Linux 7181397f5f91 3.13.0-108-generic #155-Ubuntu SMP Wed Jan 11 
16:58:52 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh 
|
| git revision | HDFS-7240 / 6b5dee9 |
| Default Java | 1.8.0_121 |
| findbugs | v3.0.0 |
| findbugs | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18788/artifact/patchprocess/branch-findbugs-hadoop-hdfs-project_hadoop-hdfs-client-warnings.html
 |
| javadoc | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18788/artifact/patchprocess/diff-javadoc-javadoc-hadoop-hdfs-project_hadoop-hdfs.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18788/artifact/patchprocess/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18788/testReport/ |
| modules | C: hadoop-hdfs-project/hadoop-hdfs-client 
hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18788/console |
| Powered by | Apache Yetus 0.5.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Block Storage : add cache interface
> -----------------------------------
>
>                 Key: HDFS-11361
>                 URL: https://issues.apache.org/jira/browse/HDFS-11361
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs
>            Reporter: Chen Liang
>            Assignee: Chen Liang
>         Attachments: HDFS-11361-HDFS-7240.001.patch, 
> HDFS-11361-HDFS-7240.002.patch, HDFS-11361-HDFS-7240.003.patch, 
> HDFS-11361-HDFS-7240.004.patch, HDFS-11361-HDFS-7240.005.patch, 
> HDFS-11361-HDFS-7240.006.patch
>
>
> This JIRA includes two major pieces: 1. the interface exposed to upper layer 
> operating system that mounts the file system; and 2. the interface exposed to 
> lower layer container storage layer.
> On one hand, to make CBlock mountable and accessible for a POSIX OS, we need 
> to implement file system protocol. We chose to do this by running cblock with 
> jSCSI (http://jscsi.org/) which is a java implementation of iSCSI protocol. 
> More specifically, CBlock volume will exposed as an java-based iSCSI target, 
> and any machine that has iSCSI installed will be able to talk to CBlock 
> volume and mounted locally just as any disks. This is JIRA make a starting 
> point by introducing jSCSI and implementing its {{IStorageModule}}. This will 
> be registered to jSCSI server in future JIRA. 
> One the other hand, to be able to have the CBlock talk to container layer 
> with better performance, CBlock should be able to cache data locally. More 
> specifically, clients' read/write should be performed on the locally disk 
> cache, while threads are pushing and retrieving data in backend. This JIRA 
> takes the first step by defining interfaces for the local cache. 



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