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https://issues.apache.org/jira/browse/HDFS-13186?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16514542#comment-16514542
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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 
20s{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 6 new or modified test 
files. {color} |
|| || || || {color:brown} trunk Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  1m 
39s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 23m 
44s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 26m 
59s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
22s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  3m 
46s{color} | {color:green} trunk passed {color} |
| {color:red}-1{color} | {color:red} shadedclient {color} | {color:red}  6m 
37s{color} | {color:red} branch has errors when building and testing our client 
artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  5m 
33s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  3m  
0s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {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}  2m 
49s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 25m 
48s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} cc {color} | {color:green} 25m 
48s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 25m 
48s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
24s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  3m 
41s{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:red}-1{color} | {color:red} shadedclient {color} | {color:red}  2m 
22s{color} | {color:red} patch has errors when building and testing our client 
artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  6m  
6s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  2m 
56s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  8m 
15s{color} | {color:green} hadoop-common in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  1m 
45s{color} | {color:green} hadoop-hdfs-client in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}101m 24s{color} 
| {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  4m 
39s{color} | {color:green} hadoop-aws in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  1m 
 2s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}231m 29s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.hdfs.web.TestWebHdfsTimeouts |
|   | hadoop.hdfs.TestDFSInotifyEventInputStreamKerberized |
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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/12928026/HDFS-13186.010.patch |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  shadedclient  findbugs  checkstyle  cc  xml  |
| uname | Linux 9bb09bd17403 4.4.0-64-generic #85-Ubuntu SMP Mon Feb 20 
11:50:30 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / 43d994e |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_171 |
| findbugs | v3.1.0-RC1 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/24458/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/24458/testReport/ |
| Max. process+thread count | 4032 (vs. ulimit of 10000) |
| modules | C: hadoop-common-project/hadoop-common 
hadoop-hdfs-project/hadoop-hdfs-client hadoop-hdfs-project/hadoop-hdfs 
hadoop-tools/hadoop-aws U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/24458/console |
| Powered by | Apache Yetus 0.8.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> [PROVIDED Phase 2] Multipart Uploader API
> -----------------------------------------
>
>                 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, 
> HDFS-13186.006.patch, HDFS-13186.007.patch, HDFS-13186.008.patch, 
> HDFS-13186.009.patch, HDFS-13186.010.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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