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https://issues.apache.org/jira/browse/HDFS-13186?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16490690#comment-16490690
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genericqa commented on HDFS-13186:
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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}  0m 
25s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {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:brown} trunk Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
20s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 26m 
 4s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 29m 
50s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  3m 
14s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  2m 
48s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
17m  1s{color} | {color:green} branch has no errors when building and testing 
our client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  4m 
12s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  2m  
4s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
20s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  2m 
 7s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 28m 
17s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} cc {color} | {color:green} 28m 
17s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} javac {color} | {color:red} 28m 17s{color} 
| {color:red} root generated 1 new + 1469 unchanged - 0 fixed = 1470 total (was 
1469) {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  
3m 14s{color} | {color:orange} root: The patch generated 25 new + 107 unchanged 
- 0 fixed = 132 total (was 107) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  2m 
46s{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} shadedclient {color} | {color:green} 
10m 27s{color} | {color:green} patch has no errors when building and testing 
our client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  4m 
34s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} javadoc {color} | {color:red}  1m  
0s{color} | {color:red} hadoop-common-project_hadoop-common generated 4 new + 0 
unchanged - 0 fixed = 4 total (was 0) {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red}  8m 49s{color} 
| {color:red} hadoop-common in the patch failed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  1m 
40s{color} | {color:green} hadoop-hdfs-client in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  4m 
39s{color} | {color:green} hadoop-aws in the patch passed. {color} |
| {color:red}-1{color} | {color:red} asflicense {color} | {color:red}  0m 
40s{color} | {color:red} The patch generated 3 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}152m 33s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.fs.TestFileSystemMultipartUploader |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:abb62dd |
| JIRA Issue | HDFS-13186 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12925129/HDFS-13186.005.patch |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  shadedclient  findbugs  checkstyle  cc  |
| uname | Linux 2bcd07b54954 3.13.0-143-generic #192-Ubuntu SMP Tue Feb 27 
10:45:36 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / bddfe79 |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_162 |
| findbugs | v3.1.0-RC1 |
| javac | 
https://builds.apache.org/job/PreCommit-HDFS-Build/24302/artifact/out/diff-compile-javac-root.txt
 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-HDFS-Build/24302/artifact/out/diff-checkstyle-root.txt
 |
| javadoc | 
https://builds.apache.org/job/PreCommit-HDFS-Build/24302/artifact/out/diff-javadoc-javadoc-hadoop-common-project_hadoop-common.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/24302/artifact/out/patch-unit-hadoop-common-project_hadoop-common.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/24302/testReport/ |
| asflicense | 
https://builds.apache.org/job/PreCommit-HDFS-Build/24302/artifact/out/patch-asflicense-problems.txt
 |
| Max. process+thread count | 1349 (vs. ulimit of 10000) |
| modules | C: hadoop-common-project/hadoop-common 
hadoop-hdfs-project/hadoop-hdfs-client hadoop-tools/hadoop-aws U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/24302/console |
| Powered by | Apache Yetus 0.8.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> [PROVIDED Phase 2] Multipart Multinode uploader API + Implementations
> ---------------------------------------------------------------------
>
>                 Key: HDFS-13186
>                 URL: https://issues.apache.org/jira/browse/HDFS-13186
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Ewan Higgs
>            Assignee: Ewan Higgs
>            Priority: Major
>         Attachments: HDFS-13186.001.patch, HDFS-13186.002.patch, 
> HDFS-13186.003.patch, HDFS-13186.004.patch, HDFS-13186.005.patch
>
>
> To write files in parallel to an external storage system as in HDFS-12090, 
> there are two approaches:
>  # Naive approach: use a single datanode per file that copies blocks locally 
> as it streams data to the external service. This requires a copy for each 
> block inside the HDFS system and then a copy for the block to be sent to the 
> external system.
>  # Better approach: Single point (e.g. Namenode or SPS style external client) 
> and Datanodes coordinate in a multipart - multinode upload.
> This system needs to work with multiple back ends and needs to coordinate 
> across the network. So we propose an API that resembles the following:
> {code:java}
> public UploadHandle multipartInit(Path filePath) throws IOException;
> public PartHandle multipartPutPart(InputStream inputStream,
>     int partNumber, UploadHandle uploadId) throws IOException;
> public void multipartComplete(Path filePath,
>     List<Pair<Integer, PartHandle>> handles, 
>     UploadHandle multipartUploadId) throws IOException;{code}
> Here, UploadHandle and PartHandle are opaque handlers in the vein of 
> PathHandle so they can be serialized and deserialized in hadoop-hdfs project 
> without knowledge of how to deserialize e.g. S3A's version of a UpoadHandle 
> and PartHandle.
> In an object store such as S3A, the implementation is straight forward. In 
> the case of writing multipart/multinode to HDFS, we can write each block as a 
> file part. The complete call will perform a concat on the blocks.



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