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https://issues.apache.org/jira/browse/HDFS-11644?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16003907#comment-16003907
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Hadoop QA commented on HDFS-11644:
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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} 16m  
6s{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}  1m 
38s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  8m 
 0s{color} | {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  6m  
2s{color} | {color:green} branch-2 passed with JDK v1.8.0_131 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  7m  
9s{color} | {color:green} branch-2 passed with JDK v1.7.0_121 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
26s{color} | {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  2m 
51s{color} | {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  1m 
35s{color} | {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  5m 
55s{color} | {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
52s{color} | {color:green} branch-2 passed with JDK v1.8.0_131 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  2m 
28s{color} | {color:green} branch-2 passed with JDK v1.7.0_121 {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
14s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  2m 
13s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  5m 
48s{color} | {color:green} the patch passed with JDK v1.8.0_131 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  5m 
48s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  6m 
38s{color} | {color:green} the patch passed with JDK v1.7.0_121 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  6m 
38s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
27s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  2m 
51s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  1m 
 0s{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} findbugs {color} | {color:green}  6m 
46s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  2m  
7s{color} | {color:green} the patch passed with JDK v1.8.0_131 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  2m 
27s{color} | {color:green} the patch passed with JDK v1.7.0_121 {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  8m 
19s{color} | {color:green} hadoop-common in the patch passed with JDK 
v1.7.0_121. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  1m 
15s{color} | {color:green} hadoop-hdfs-client in the patch passed with JDK 
v1.7.0_121. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 55m 48s{color} 
| {color:red} hadoop-hdfs in the patch failed with JDK v1.7.0_121. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  1m 
35s{color} | {color:green} hadoop-azure in the patch passed with JDK 
v1.7.0_121. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
23s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}227m  4s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| JDK v1.8.0_131 Failed junit tests | hadoop.hdfs.TestBlockStoragePolicy |
|   | hadoop.hdfs.server.namenode.TestNamenodeCapacityReport |
| JDK v1.8.0_131 Timed out junit tests | 
org.apache.hadoop.hdfs.server.blockmanagement.TestBlockStatsMXBean |
| JDK v1.7.0_121 Failed junit tests | 
hadoop.hdfs.server.namenode.TestDecommissioningStatus |
|   | hadoop.hdfs.server.blockmanagement.TestReplicationPolicyWithUpgradeDomain 
|
| JDK v1.7.0_121 Timed out junit tests | 
org.apache.hadoop.hdfs.server.datanode.TestDataNodeVolumeFailureReporting |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:8515d35 |
| JIRA Issue | HDFS-11644 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12867184/HDFS-11644-branch-2.01.patch
 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  findbugs  checkstyle  |
| uname | Linux 54e38d16b7e8 3.13.0-107-generic #154-Ubuntu SMP Tue Dec 20 
09:57:27 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh 
|
| git revision | branch-2 / 3403ed3 |
| Default Java | 1.7.0_121 |
| Multi-JDK versions |  /usr/lib/jvm/java-8-oracle:1.8.0_131 
/usr/lib/jvm/java-7-openjdk-amd64:1.7.0_121 |
| findbugs | v3.0.0 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/19368/artifact/patchprocess/patch-unit-hadoop-hdfs-project_hadoop-hdfs-jdk1.7.0_121.txt
 |
| JDK v1.7.0_121  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/19368/testReport/ |
| modules | C: hadoop-common-project/hadoop-common 
hadoop-hdfs-project/hadoop-hdfs-client hadoop-hdfs-project/hadoop-hdfs 
hadoop-tools/hadoop-azure U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/19368/console |
| Powered by | Apache Yetus 0.5.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Support for querying outputstream capabilities
> ----------------------------------------------
>
>                 Key: HDFS-11644
>                 URL: https://issues.apache.org/jira/browse/HDFS-11644
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: erasure-coding
>    Affects Versions: 3.0.0-alpha1
>            Reporter: Andrew Wang
>            Assignee: Manoj Govindassamy
>              Labels: hdfs-ec-3.0-must-do
>             Fix For: 3.0.0-alpha3
>
>         Attachments: HDFS-11644.01.patch, HDFS-11644.02.patch, 
> HDFS-11644.03.patch, HDFS-11644-branch-2.01.patch
>
>
> FSDataOutputStream#hsync checks if a stream implements Syncable, and if so, 
> calls hsync. Otherwise, it just calls flush. This is used, for instance, by 
> YARN's FileSystemTimelineWriter.
> DFSStripedOutputStream extends DFSOutputStream, which implements Syncable. 
> However, DFSStripedOS throws a runtime exception when the Syncable methods 
> are called.
> We should refactor the inheritance structure so DFSStripedOS does not 
> implement Syncable.



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