[jira] [Created] (YARN-10779) Add option to disable lowecase conversion in GetApplicationsRequestPBImpl and ApplicationSubmissionContextPBImpl

["Peter Bacsko (Jira)" <ji...@apache.org>]

Peter Bacsko created YARN-10779:
-----------------------------------

             Summary: Add option to disable lowecase conversion in GetApplicationsRequestPBImpl and ApplicationSubmissionContextPBImpl
                 Key: YARN-10779
                 URL: https://issues.apache.org/jira/browse/YARN-10779
             Project: Hadoop YARN
          Issue Type: Task
          Components: resourcemanager
            Reporter: Peter Bacsko
            Assignee: Peter Bacsko


In both {{GetApplicationsRequestPBImpl}} and {{ApplicationSubmissionContextPBImpl}}, there is a forced lowercase conversion:

{noformat}
    checkTags(tags);
    // Convert applicationTags to lower case and add
    this.applicationTags = new TreeSet<>();
    for (String tag : tags) {
      this.applicationTags.add(StringUtils.toLowerCase(tag));
    }
  }
{noformat}

However, we encountered some cases where this is not desirable for "userid" tags. 

Proposed solution: since both classes are pretty low-level and can be often instantiated, a {{Configuration}} object which loads {{yarn-site.xml}} should be cached inside them. A new property should be created which tells whether lowercase conversion should occur or not.



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