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https://issues.apache.org/jira/browse/HADOOP-17657?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17335718#comment-17335718
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Hadoop QA commented on HADOOP-17657:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime ||  Logfile || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 
33s{color} |  | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} || ||
| {color:green}+1{color} | {color:green} dupname {color} | {color:green}  0m  
1s{color} |  | {color:green} No case conflicting files found. {color} |
| {color:blue}0{color} | {color:blue} codespell {color} | {color:blue}  0m  
0s{color} |  | {color:blue} codespell was not available. {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:green}+1{color} | {color:green} mvninstall {color} | {color:green} 34m 
51s{color} |  | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 20m 
43s{color} |  | {color:green} trunk passed with JDK 
Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 18m  
1s{color} |  | {color:green} trunk passed with JDK Private 
Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
 8s{color} |  | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 
28s{color} |  | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m  
5s{color} |  | {color:green} trunk passed with JDK 
Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
31s{color} |  | {color:green} trunk passed with JDK Private 
Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 {color} |
| {color:green}+1{color} | {color:green} spotbugs {color} | {color:green}  2m 
22s{color} |  | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
16m 32s{color} |  | {color:green} branch has no errors when building and 
testing our client artifacts. {color} |
|| || || || {color:brown} Patch Compile Tests {color} || ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
57s{color} |  | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 21m 
26s{color} |  | {color:green} the patch passed with JDK 
Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 {color} |
| {color:red}-1{color} | {color:red} javac {color} | {color:red} 21m 26s{color} 
| 
[/results-compile-javac-root-jdkUbuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04.txt|https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2949/8/artifact/out/results-compile-javac-root-jdkUbuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04.txt]
 | {color:red} root-jdkUbuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 with JDK 
Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 generated 1 new + 1985 unchanged - 0 
fixed = 1986 total (was 1985) {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 19m 
44s{color} |  | {color:green} the patch passed with JDK Private 
Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 {color} |
| {color:red}-1{color} | {color:red} javac {color} | {color:red} 19m 44s{color} 
| 
[/results-compile-javac-root-jdkPrivateBuild-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08.txt|https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2949/8/artifact/out/results-compile-javac-root-jdkPrivateBuild-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08.txt]
 | {color:red} root-jdkPrivateBuild-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 with 
JDK Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 generated 1 new + 1887 
unchanged - 0 fixed = 1888 total (was 1887) {color} |
| {color:green}+1{color} | {color:green} blanks {color} | {color:green}  0m  
0s{color} |  | {color:green} The patch has no blanks issues. {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  
1m  1s{color} | 
[/results-checkstyle-hadoop-common-project_hadoop-common.txt|https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2949/8/artifact/out/results-checkstyle-hadoop-common-project_hadoop-common.txt]
 | {color:orange} hadoop-common-project/hadoop-common: The patch generated 1 
new + 352 unchanged - 0 fixed = 353 total (was 352) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 
36s{color} |  | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
59s{color} |  | {color:green} the patch passed with JDK 
Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
34s{color} |  | {color:green} the patch passed with JDK Private 
Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 {color} |
| {color:green}+1{color} | {color:green} spotbugs {color} | {color:green}  2m 
39s{color} |  | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
17m  1s{color} |  | {color:green} patch has no errors when building and testing 
our client artifacts. {color} |
|| || || || {color:brown} Other Tests {color} || ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 17m 20s{color} 
| 
[/patch-unit-hadoop-common-project_hadoop-common.txt|https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2949/8/artifact/out/patch-unit-hadoop-common-project_hadoop-common.txt]
 | {color:red} hadoop-common in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
45s{color} |  | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}183m 10s{color} | 
 | {color:black}{color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.io.TestSequenceFile |
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|| Subsystem || Report/Notes ||
| Docker | ClientAPI=1.41 ServerAPI=1.41 base: 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2949/8/artifact/out/Dockerfile
 |
| GITHUB PR | https://github.com/apache/hadoop/pull/2949 |
| JIRA Issue | HADOOP-17657 |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite 
unit shadedclient spotbugs checkstyle codespell |
| uname | Linux 20266c118a02 4.15.0-58-generic #64-Ubuntu SMP Tue Aug 6 
11:12:41 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | dev-support/bin/hadoop.sh |
| git revision | trunk / 87c32ab075331b494bfe2aa472640db4d5e32c5b |
| Default Java | Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 |
| Multi-JDK versions | 
/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 
/usr/lib/jvm/java-8-openjdk-amd64:Private 
Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 |
|  Test Results | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2949/8/testReport/ |
| Max. process+thread count | 1295 (vs. ulimit of 5500) |
| modules | C: hadoop-common-project/hadoop-common U: 
hadoop-common-project/hadoop-common |
| Console output | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2949/8/console |
| versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
| Powered by | Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org |


This message was automatically generated.



> SequeneFile.Writer should implement StreamCapabilities
> ------------------------------------------------------
>
>                 Key: HADOOP-17657
>                 URL: https://issues.apache.org/jira/browse/HADOOP-17657
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Kishen Das
>            Assignee: Kishen Das
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 3h 10m
>  Remaining Estimate: 0h
>
> Following exception is thrown whenever we invoke ProtoMessageWriter.hflush on 
> S3 from Tez, which internally calls 
> org.apache.hadoop.io.SequenceFile$Writer.hflush ->  org.apache.hadoop.fs.FS 
> DataOutputStream.hflush -> S3ABlockOutputStream.hflush which is not 
> implemented and throws java.lang.UnsupportedOperationException. 
> bdffe22d96ae [mdc@18060 class="yarn.YarnUncaughtExceptionHandler" 
> level="ERROR" thread="HistoryEventHandlingThread"] Thread 
> Thread[HistoryEventHandlingThread, 5,main] threw an 
> Exception.^Mjava.lang.UnsupportedOperationException: S3A streams are not 
> Syncable^M at 
> org.apache.hadoop.fs.s3a.S3ABlockOutputStream.hflush(S3ABlockOutputStream.java:657)^M
>  at org.apache.hadoop.fs.FS 
> DataOutputStream.hflush(FSDataOutputStream.java:136)^M at 
> org.apache.hadoop.io.SequenceFile$Writer.hflush(SequenceFile.java:1367)^M at 
> org.apache.tez.dag.history.logging.proto.ProtoMessageWriter.hflush(ProtoMessageWr
>  iter.java:64)^M at 
> org.apache.tez.dag.history.logging.proto.ProtoHistoryLoggingService.finishCurrentDag(ProtoHistoryLoggingService.java:239)^M
>  at org.apache.tez.dag.history.logging.proto.ProtoHistoryLoggingService.han 
> dleEvent(ProtoHistoryLoggingService.java:198)^M at 
> org.apache.tez.dag.history.logging.proto.ProtoHistoryLoggingService.loop(ProtoHistoryLoggingService.java:153)^M
>  at java.lang.Thread.run(Thread.java:748)^M
> In order to fix this issue we should implement StreamCapabilities in 
> SequenceFile.Writer. Also, we should fall back to flush(), if hflush() is not 
> supported. 



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