[
https://issues.apache.org/jira/browse/TEZ-4175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17164258#comment-17164258
]
László Bodor edited comment on TEZ-4175 at 7/24/20, 1:28 PM:
-------------------------------------------------------------
thanks [~rajesh.balamohan]!
I've already checked and I can see the yarn conf is just the leftover of old
code, I mean, it just repacks tezConf everywhere
it [comes from AMConfiguration to
client|https://github.com/apache/tez/blob/master/tez-api/src/main/java/org/apache/tez/client/TezClient.java#L469],
and checked all references of AMConfiguration.setYarnConfiguration:
https://github.com/apache/tez/blob/master/tez-api/src/main/java/org/apache/tez/client/TezClient.java#L387
https://github.com/apache/tez/blob/master/tez-api/src/main/java/org/apache/tez/client/TezClient.java#L437
the only reason I can see to do "new YarnConfiguration(tezConf)" is e.g.
recovering a yarn bug where yarn would touch tez config in a destructive way,
but currently, I'm not aware of such issue...but even if that's the case, we
can do that inside TezYarnClient.init, without polluting the api, IMHO
UPDATE: let me double-check again as YarnConfiguration adds default resources
in static initializer
was (Author: abstractdog):
thanks [~rajesh.balamohan]!
I've already checked and I can see the yarn conf is just the leftover of old
code, I mean, it just repacks tezConf everywhere
it [comes from AMConfiguration to
client|https://github.com/apache/tez/blob/master/tez-api/src/main/java/org/apache/tez/client/TezClient.java#L469],
and checked all references of AMConfiguration.setYarnConfiguration:
https://github.com/apache/tez/blob/master/tez-api/src/main/java/org/apache/tez/client/TezClient.java#L387
https://github.com/apache/tez/blob/master/tez-api/src/main/java/org/apache/tez/client/TezClient.java#L437
the only reason I can see to do "new YarnConfiguration(tezConf)" is e.g.
recovering a yarn bug where yarn would touch tez config in a destructive way,
but currently, I'm not aware of such issue...but even if that's the case, we
can do that inside TezYarnClient.init, without polluting the api, IMHO
> Consider removing YarnConfiguration where it's possible
> -------------------------------------------------------
>
> Key: TEZ-4175
> URL: https://issues.apache.org/jira/browse/TEZ-4175
> Project: Apache Tez
> Issue Type: Improvement
> Reporter: László Bodor
> Assignee: László Bodor
> Priority: Major
> Attachments: TEZ-4175.01.patch, TEZ-4175.02.patch, TEZ-4175.03.patch,
> TEZ-4175.03.patch
>
>
> A comment in DAGAppmaster made me think that we don't need to rely on
> [YarnConfiguration|https://github.com/apache/hadoop/blob/branch-3.1.3/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java]
> in all cases, what if it can be replace with base Configuration...
> {code}
> // TODO Does this really need to be a YarnConfiguration ?
> Configuration conf = new Configuration(new YarnConfiguration());
> {code}
> In hadoop 3.1.3 source, I cannot see that it adds e.g. yarn-site as a
> resource:
> {code}
> public YarnConfiguration() {
> super();
> }
>
> public YarnConfiguration(Configuration conf) {
> super(conf);
> if (! (conf instanceof YarnConfiguration)) {
> this.reloadConfiguration();
> }
> }
> {code}
> in current codebase:
> {code}
> grep -iRH "new YarnConfiguration" --include="*.java"
> tez-plugins/tez-history-parser/src/main/java/org/apache/tez/history/ATSImportTool.java:
> YarnConfiguration yarnConf = new YarnConfiguration(conf);
> tez-plugins/tez-aux-services/src/main/java/org/apache/tez/auxservices/ShuffleHandler.java:
> super.serviceInit(new YarnConfiguration(conf));
> tez-api/src/test/java/org/apache/tez/dag/api/client/rpc/TestDAGClient.java:
> YarnConfiguration yarnConf = new YarnConfiguration(tezConf);
> tez-api/src/test/java/org/apache/tez/dag/api/client/rpc/TestDAGClient.java:
> YarnConfiguration yarnConf = new YarnConfiguration(tezConf);
> tez-api/src/test/java/org/apache/tez/dag/api/client/rpc/TestDAGClient.java:
> YarnConfiguration yarnConf = new YarnConfiguration(tezConf);
> tez-api/src/test/java/org/apache/tez/client/TestTezClient.java:
> tezClient.init(new TezConfiguration(false), new YarnConfiguration());
> tez-api/src/main/java/org/apache/tez/client/TezClient.java:
> amConfig.setYarnConfiguration(new
> YarnConfiguration(amConfig.getTezConfiguration()));
> tez-api/src/main/java/org/apache/tez/client/TezClient.java:
> amConfig.setYarnConfiguration(new
> YarnConfiguration(amConfig.getTezConfiguration()));
> tez-api/src/main/java/org/apache/tez/client/TezClient.java: return
> getDAGClient(appId, tezConf, new YarnConfiguration(tezConf), frameworkClient,
> ugi);
> tez-tests/src/test/java/org/apache/tez/test/FaultToleranceTestRunner.java:
> tezConf = new TezConfiguration(new YarnConfiguration());
> tez-tests/src/test/java/org/apache/tez/test/FaultToleranceTestRunner.java:
> tezConf = new TezConfiguration(new YarnConfiguration(this.conf));
> tez-mapreduce/src/test/java/org/apache/tez/mapreduce/hadoop/TestMRInputHelpers.java:
> Configuration testConf = new YarnConfiguration(
> tez-mapreduce/src/main/java/org/apache/tez/mapreduce/client/YARNRunner.java:
> this(conf, new ResourceMgrDelegate(new YarnConfiguration(conf)));
> tez-dag/src/test/java/org/apache/tez/dag/app/rm/TestContainerReuse.java:
> Configuration conf = new Configuration(new YarnConfiguration());
> tez-dag/src/test/java/org/apache/tez/dag/app/rm/TestContainerReuse.java:
> Configuration conf = new Configuration(new YarnConfiguration());
> tez-dag/src/test/java/org/apache/tez/dag/app/rm/TestContainerReuse.java:
> Configuration tezConf = new Configuration(new YarnConfiguration());
> tez-dag/src/test/java/org/apache/tez/dag/app/rm/TestContainerReuse.java:
> Configuration tezConf = new Configuration(new YarnConfiguration());
> tez-dag/src/test/java/org/apache/tez/dag/app/rm/TestContainerReuse.java:
> Configuration tezConf = new Configuration(new YarnConfiguration());
> tez-dag/src/test/java/org/apache/tez/dag/app/rm/TestContainerReuse.java:
> Configuration tezConf = new Configuration(new YarnConfiguration());
> tez-dag/src/test/java/org/apache/tez/dag/app/rm/TestContainerReuse.java:
> Configuration tezConf = new Configuration(new YarnConfiguration());
> tez-dag/src/test/java/org/apache/tez/dag/app/rm/TestContainerReuse.java:
> Configuration tezConf = new Configuration(new YarnConfiguration());
> tez-dag/src/test/java/org/apache/tez/dag/app/rm/TestContainerReuse.java:
> Configuration tezConf = new Configuration(new YarnConfiguration());
> tez-dag/src/test/java/org/apache/tez/dag/app/rm/TestContainerReuse.java:
> Configuration tezConf = new Configuration(new YarnConfiguration());
> tez-dag/src/test/java/org/apache/tez/dag/app/rm/TestContainerReuse.java:
> Configuration tezConf = new Configuration(new YarnConfiguration());
> tez-dag/src/main/java/org/apache/tez/dag/app/DAGAppMaster.java:
> Configuration conf = new Configuration(new YarnConfiguration());
> {code}
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
