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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-15625) S3A input stream to use etags to detect changed source files
Date Wed, 06 Mar 2019 02:33:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-15625?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16785167#comment-16785167
] 

Hadoop QA commented on HADOOP-15625:
------------------------------------

| (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 28s{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 4 new or modified test files. {color} |
|| || || || {color:brown} trunk Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  1m 55s{color} | {color:blue}
Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 19m 29s{color}
| {color:green} trunk passed {color} |
| {color:red}-1{color} | {color:red} compile {color} | {color:red} 10m 53s{color} | {color:red}
root in trunk failed. {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  4m 13s{color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  2m  7s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 18m 33s{color}
| {color:green} branch has no errors when building and testing our client artifacts. {color}
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| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  2m 24s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 23s{color} |
{color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 22s{color} | {color:blue}
Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m 21s{color}
| {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} compile {color} | {color:red} 10m 28s{color} | {color:red}
root in the patch failed. {color} |
| {color:red}-1{color} | {color:red} javac {color} | {color:red} 10m 28s{color} | {color:red}
root in the patch failed. {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  3m 23s{color}
| {color:orange} root: The patch generated 2 new + 33 unchanged - 0 fixed = 35 total (was
33) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 48s{color} |
{color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} whitespace {color} | {color:red}  0m  1s{color} | {color:red}
The patch has 80 line(s) that end in whitespace. Use git apply --whitespace=fix <<patch_file>>.
Refer https://git-scm.com/docs/git-apply {color} |
| {color:red}-1{color} | {color:red} whitespace {color} | {color:red}  0m 15s{color} | {color:red}
The patch 19849 line(s) with tabs. {color} |
| {color:green}+1{color} | {color:green} xml {color} | {color:green}  0m  2s{color} | {color:green}
The patch has no ill-formed XML file. {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 11m 46s{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}  2m 36s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 25s{color} |
{color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  9m 47s{color} | {color:green}
hadoop-common in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  4m 47s{color} | {color:green}
hadoop-aws in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 37s{color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}171m 45s{color} | {color:black}
{color} |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:8f97d6f |
| JIRA Issue | HADOOP-15625 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12961262/HADOOP-15625-013.patch
|
| Optional Tests |  dupname  asflicense  compile  javac  javadoc  mvninstall  mvnsite  unit
 shadedclient  xml  findbugs  checkstyle  |
| uname | Linux be8a6770a0a1 3.13.0-153-generic #203-Ubuntu SMP Thu Jun 14 08:52:28 UTC 2018
x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / 7f636b4 |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_191 |
| compile | https://builds.apache.org/job/PreCommit-HADOOP-Build/16020/artifact/out/branch-compile-root.txt
|
| findbugs | v3.1.0-RC1 |
| compile | https://builds.apache.org/job/PreCommit-HADOOP-Build/16020/artifact/out/patch-compile-root.txt
|
| javac | https://builds.apache.org/job/PreCommit-HADOOP-Build/16020/artifact/out/patch-compile-root.txt
|
| checkstyle | https://builds.apache.org/job/PreCommit-HADOOP-Build/16020/artifact/out/diff-checkstyle-root.txt
|
| whitespace | https://builds.apache.org/job/PreCommit-HADOOP-Build/16020/artifact/out/whitespace-eol.txt
|
| whitespace | https://builds.apache.org/job/PreCommit-HADOOP-Build/16020/artifact/out/whitespace-tabs.txt
|
|  Test Results | https://builds.apache.org/job/PreCommit-HADOOP-Build/16020/testReport/ |
| Max. process+thread count | 1347 (vs. ulimit of 10000) |
| modules | C: hadoop-common-project/hadoop-common hadoop-tools/hadoop-aws U: . |
| Console output | https://builds.apache.org/job/PreCommit-HADOOP-Build/16020/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> S3A input stream to use etags to detect changed source files
> ------------------------------------------------------------
>
>                 Key: HADOOP-15625
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15625
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 3.2.0
>            Reporter: Brahma Reddy Battula
>            Assignee: Brahma Reddy Battula
>            Priority: Major
>         Attachments: HADOOP--15625-006.patch, HADOOP-15625-001.patch, HADOOP-15625-002.patch,
HADOOP-15625-003.patch, HADOOP-15625-004.patch, HADOOP-15625-005.patch, HADOOP-15625-006.patch,
HADOOP-15625-007.patch, HADOOP-15625-008.patch, HADOOP-15625-009.patch, HADOOP-15625-010.patch,
HADOOP-15625-011.patch, HADOOP-15625-012.patch, HADOOP-15625-013-delta.patch, HADOOP-15625-013.patch
>
>
> S3A input stream doesn't handle changing source files any better than the other cloud
store connectors. Specifically: it doesn't noticed it has changed, caches the length from
startup, and whenever a seek triggers a new GET, you may get one of: old data, new data, and
even perhaps go from new data to old data due to eventual consistency.
> We can't do anything to stop this, but we could detect changes by
> # caching the etag of the first HEAD/GET (we don't get that HEAD on open with S3Guard,
BTW)
> # on future GET requests, verify the etag of the response
> # raise an IOE if the remote file changed during the read.
> It's a more dramatic failure, but it stops changes silently corrupting things.



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