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From "TezQA (Jira)" <j...@apache.org>
Subject [jira] [Commented] (TEZ-4067) Tez Speculation decision is calculated on each update by the dispatcher
Date Thu, 07 Nov 2019 21:36:00 GMT

    [ https://issues.apache.org/jira/browse/TEZ-4067?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16969574#comment-16969574
] 

TezQA commented on TEZ-4067:
----------------------------

| (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 19s{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 2 new or modified test files. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 51s{color} | {color:blue}
Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  5m 17s{color}
| {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 57s{color} |
{color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 53s{color}
| {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  2m  2s{color} |
{color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m  2s{color} |
{color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 20s{color} | {color:blue}
Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 56s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 55s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 55s{color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 23s{color}
| {color:green} The patch passed checkstyle in tez-api {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 30s{color}
| {color:green} tez-dag: The patch generated 0 new + 142 unchanged - 1 fixed = 142 total (was
143) {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}  1m 56s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m  3s{color} |
{color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  1m 54s{color} | {color:green}
tez-api in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}  3m 49s{color} | {color:red}
tez-dag in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 35s{color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 25m  5s{color} | {color:black}
{color} |
\\
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|| Reason || Tests ||
| Failed junit tests | tez.dag.app.TestSpeculation |
\\
\\
|| Subsystem || Report/Notes ||
| Docker | Client=19.03.4 Server=19.03.4 Image:yetus/tez:d4a62deee |
| JIRA Issue | TEZ-4067 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12985272/TEZ-4067.003.patch
|
| Optional Tests |  dupname  asflicense  javac  javadoc  unit  findbugs  checkstyle  compile
 |
| uname | Linux 97af557c6346 4.15.0-60-generic #67-Ubuntu SMP Thu Aug 22 16:55:30 UTC 2019
x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | master / b99c7ce |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_222 |
| findbugs | v3.0.1 |
| unit | https://builds.apache.org/job/PreCommit-TEZ-Build/195/artifact/out/patch-unit-tez-dag.txt
|
|  Test Results | https://builds.apache.org/job/PreCommit-TEZ-Build/195/testReport/ |
| Max. process+thread count | 230 (vs. ulimit of 5500) |
| modules | C: tez-api tez-dag U: . |
| Console output | https://builds.apache.org/job/PreCommit-TEZ-Build/195/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> Tez Speculation decision is calculated on each update by the dispatcher
> -----------------------------------------------------------------------
>
>                 Key: TEZ-4067
>                 URL: https://issues.apache.org/jira/browse/TEZ-4067
>             Project: Apache Tez
>          Issue Type: Improvement
>            Reporter: Ahmed Hussein
>            Assignee: Ahmed Hussein
>            Priority: Minor
>         Attachments: TEZ-4067.001.patch, TEZ-4067.002.patch, TEZ-4067.003.patch
>
>
> LegacySpeculator is an object field in VertexImpl. Therefore, all events are handled
synchronously by the caller (dispatcher). This implies the following:
>  # the dispatcher spends long time executing updateStatus as it needs to check the runtime
estimation of the tezAttempts within the vertex.
>  # the speculator is per stage: lunching a speculation may not the optimum decision.
Ideally, based on resources, speculated tasks should be the ones with slowest progress.
>  # the time between speculation is skewed because there is a big delay for the dispatcher
to complete a full cycle. Also, speculation will be more aggressive compared to MR because
MR waits for "soonest.retry.after.speculate" whenever a task is speculated. On the other hand,
Tez speculates more tasks as it processes stages in parallel.
>  



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