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Posted to common-issues@hadoop.apache.org by "Hadoop QA (JIRA)" <ji...@apache.org> on 2016/10/14 12:34:21 UTC

[jira] [Commented] (HADOOP-13716) Add LambdaTestUtils class for tests; fix eventual consistency problem in contract test setup

    [ https://issues.apache.org/jira/browse/HADOOP-13716?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15575205#comment-15575205 ] 

Hadoop QA commented on HADOOP-13716:
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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 15s{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 6 new or modified test files. {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  1m  5s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  7m 16s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  8m  9s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 37s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 32s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 38s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  2m 17s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 13s{color} | {color:green} trunk passed {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}  1m  6s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  8m 48s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} javac {color} | {color:red}  8m 48s{color} | {color:red} root generated 1 new + 701 unchanged - 1 fixed = 702 total (was 702) {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  1m 41s{color} | {color:orange} root: The patch generated 9 new + 25 unchanged - 0 fixed = 34 total (was 25) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 31s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 35s{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}  2m 32s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 22s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  8m 47s{color} | {color:green} hadoop-common in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  0m 33s{color} | {color:green} hadoop-aws in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 31s{color} | {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 75m 10s{color} | {color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:9560f25 |
| JIRA Issue | HADOOP-13716 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12833351/HADOOP-13716-005.patch |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  unit  findbugs  checkstyle  |
| uname | Linux 962c60cb8391 3.13.0-95-generic #142-Ubuntu SMP Fri Aug 12 17:00:09 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / dbe663d |
| Default Java | 1.8.0_101 |
| findbugs | v3.0.0 |
| javac | https://builds.apache.org/job/PreCommit-HADOOP-Build/10788/artifact/patchprocess/diff-compile-javac-root.txt |
| checkstyle | https://builds.apache.org/job/PreCommit-HADOOP-Build/10788/artifact/patchprocess/diff-checkstyle-root.txt |
|  Test Results | https://builds.apache.org/job/PreCommit-HADOOP-Build/10788/testReport/ |
| modules | C: hadoop-common-project/hadoop-common hadoop-tools/hadoop-aws U: . |
| Console output | https://builds.apache.org/job/PreCommit-HADOOP-Build/10788/console |
| Powered by | Apache Yetus 0.4.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Add LambdaTestUtils class for tests; fix eventual consistency problem in contract test setup
> --------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-13716
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13716
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: test
>    Affects Versions: 2.8.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>         Attachments: HADOOP-13716-001.patch, HADOOP-13716-002.patch, HADOOP-13716-003.patch, HADOOP-13716-005.patch, HADOOP-13716-branch-2-004.patch
>
>
> To make our tests robust against timing problems and eventual consistent stores, we need to do more spin & wait for state.
> We have some code in {{GenericTestUtils.waitFor}} to await a condition being met, but the predicate it calls doesn't throw exceptions, there's no way for a probe to throw an exception, and all you get is the eventual "timed out" message. 
> We can do better, and in closure-ready languages (scala & scalatest, groovy and some slider code) we've examples to follow. Some of that work has been reimplemented slightly in {{S3ATestUtils.eventually}}
> I propose adding a class in the test tree, {{Eventually}} to be a successor/replacement for these.
> # has an eventually/waitfor operation taking a predicate that throws an exception
> # has an "evaluate" exception which tries to evaluate an answer until the operation stops raising an exception. (again, from scalatest)
> # plugin backoff strategies (from Scalatest; lets you do exponential as well as linear)
> # option of adding a special handler to generate the failure exception (e.g. run more detailed diagnostics for the exception text, etc).
> # be Java 8 lambda expression friendly
> # be testable and tested itself.



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