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https://issues.apache.org/jira/browse/YARN-5877?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15664571#comment-15664571
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Sunil G commented on YARN-5877:
-------------------------------
Currently {{whitelistedEnv}} is used to emit special ENV variables which are to
be with container context. Post YARN-3853, its limited to a set of ENV
variables such as below.
{code}
whitelist.add(ApplicationConstants.Environment.HADOOP_YARN_HOME.name());
whitelist.add(ApplicationConstants.Environment.HADOOP_COMMON_HOME.name());
whitelist.add(ApplicationConstants.Environment.HADOOP_HDFS_HOME.name());
whitelist.add(ApplicationConstants.Environment.HADOOP_CONF_DIR.name());
whitelist.add(ApplicationConstants.Environment.JAVA_HOME.name());
{code}
So if a user adds HADOOP_MAPRED_HOME to whitelist via
{{yarn.nodemanager.env-whitelist}} then it will *NOT* be emitted with
{{whitelistedEnv}}. It will be just set as a normal env variable.
Here if user wants all such variables from {{yarn.nodemanager.env-whitelist}}
to emit with help of {{whitelistedEnv}} api to {{launch_container.sh}}, then
proposed solution makes sense to me. But I am not very sure whether all such
variables configured under {{yarn.nodemanager.env-whitelist}} is to be emitted
with help of {{whitelistedEnv}} api. For eg {{CLASSPATH_PREPEND_DISTCACHE}}.
[~vvasudev] , thoughts?
> Allow all nm-whitelist-env to get overridden during launch
> ----------------------------------------------------------
>
> Key: YARN-5877
> URL: https://issues.apache.org/jira/browse/YARN-5877
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Bibin A Chundatt
> Assignee: Bibin A Chundatt
>
> As per the {{yarn.nodemanager.env-whitelist}} for the configured values
> should containers may override rather than use NodeManager's default.
> {code}
> <property>
> <description>Environment variables that containers may override rather
> than use NodeManager's default.</description>
> <name>yarn.nodemanager.env-whitelist</name>
>
> <value>JAVA_HOME,HADOOP_COMMON_HOME,HADOOP_HDFS_HOME,HADOOP_CONF_DIR,CLASSPATH_PREPEND_DISTCACHE,HADOOP_YARN_HOME</value>
> </property>
> {code}
> But only the following containers can override
> {code}
> whitelist.add(ApplicationConstants.Environment.HADOOP_YARN_HOME.name());
> whitelist.add(ApplicationConstants.Environment.HADOOP_COMMON_HOME.name());
> whitelist.add(ApplicationConstants.Environment.HADOOP_HDFS_HOME.name());
> whitelist.add(ApplicationConstants.Environment.HADOOP_CONF_DIR.name());
> whitelist.add(ApplicationConstants.Environment.JAVA_HOME.name());
> {code}
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