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https://issues.apache.org/jira/browse/TEZ-4236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17210770#comment-17210770
 ] 

Hadoop QA commented on TEZ-4236:
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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} 19m 
10s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} dupname {color} | {color:green}  0m  
0s{color} | {color:green} No case conflicting files found. {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} master Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
28s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  5m 
25s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
24s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
46s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
50s{color} | {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} spotbugs {color} | {color:blue}  0m 
47s{color} | {color:blue} Used deprecated FindBugs config; considering 
switching to SpotBugs. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  3m 
23s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m  
8s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m 
 1s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
58s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
58s{color} | {color:green} the patch passed {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  
0m 14s{color} | {color:orange} tez-api: The patch generated 7 new + 130 
unchanged - 1 fixed = 137 total (was 131) {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  
0m 21s{color} | {color:orange} tez-dag: The patch generated 10 new + 105 
unchanged - 0 fixed = 115 total (was 105) {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} javadoc {color} | {color:green}  1m  
6s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  3m 
35s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red}  1m 47s{color} 
| {color:red} tez-api in the patch failed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  4m 
28s{color} | {color:green} tez-dag in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 39m 44s{color} 
| {color:red} tez-tests in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
27s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 88m 55s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | tez.client.TestTezClient |
|   | tez.test.TestDAGRecovery2 |
|   | tez.test.TestLocalMode |
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|| Subsystem || Report/Notes ||
| Docker | ClientAPI=1.40 ServerAPI=1.40 base: 
https://ci-hadoop.apache.org/job/PreCommit-TEZ-Build/35/artifact/out/Dockerfile 
|
| JIRA Issue | TEZ-4236 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/13013290/TEZ-4236.01.patch |
| Optional Tests | dupname asflicense javac javadoc unit spotbugs findbugs 
checkstyle compile |
| uname | Linux dd059eb3337c 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 
23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | personality/tez.sh |
| git revision | master / 6e9c1b2d6 |
| Default Java | Private Build-1.8.0_265-8u265-b01-0ubuntu2~18.04-b01 |
| checkstyle | 
https://ci-hadoop.apache.org/job/PreCommit-TEZ-Build/35/artifact/out/diff-checkstyle-tez-api.txt
 |
| checkstyle | 
https://ci-hadoop.apache.org/job/PreCommit-TEZ-Build/35/artifact/out/diff-checkstyle-tez-dag.txt
 |
| unit | 
https://ci-hadoop.apache.org/job/PreCommit-TEZ-Build/35/artifact/out/patch-unit-tez-api.txt
 |
| unit | 
https://ci-hadoop.apache.org/job/PreCommit-TEZ-Build/35/artifact/out/patch-unit-tez-tests.txt
 |
|  Test Results | 
https://ci-hadoop.apache.org/job/PreCommit-TEZ-Build/35/testReport/ |
| Max. process+thread count | 1228 (vs. ulimit of 5500) |
| modules | C: tez-api tez-dag tez-tests U: . |
| Console output | 
https://ci-hadoop.apache.org/job/PreCommit-TEZ-Build/35/console |
| versions | git=2.17.1 maven=3.6.0 findbugs=3.0.1 |
| Powered by | Apache Yetus 0.12.0 https://yetus.apache.org |


This message was automatically generated.



> Investigate if DAGAppMaster's DAGClientServer is really need to be 
> started/used in local mode
> ---------------------------------------------------------------------------------------------
>
>                 Key: TEZ-4236
>                 URL: https://issues.apache.org/jira/browse/TEZ-4236
>             Project: Apache Tez
>          Issue Type: Improvement
>            Reporter: László Bodor
>            Assignee: László Bodor
>            Priority: Major
>         Attachments: TEZ-4236.01.patch
>
>
> For a customer, we found that they try to run hive on tez local mode tests, 
> and due to strict firewall rules and security policy, the DagClientServer 
> struggles to start or respond to connections (think about corporate laptops 
> here). Instead of investigating the network-related workarounds, let's find 
> another way and decide if DAGAppMaster really needs this server. 
> LocalClient has an embedded 
> [DAGAppMaster|https://github.com/apache/tez/blob/master/tez-dag/src/main/java/org/apache/tez/client/LocalClient.java#L65],
>  so at the first sight, it doesn't make sense to rely on the network 
> environment in terms of AM usage. Hopefully, AM can become more lightweight 
> in the long term if we try to eliminate pointless network usage. 



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