[jira] [Created] (YARN-5992) revert the visibility of interface AllocationFileLoaderService.Listener to public for outside usage

["Pan Yuxuan (JIRA)" <ji...@apache.org>]

Pan Yuxuan created YARN-5992:
--------------------------------

             Summary: revert the visibility of interface AllocationFileLoaderService.Listener to public for outside usage
                 Key: YARN-5992
                 URL: https://issues.apache.org/jira/browse/YARN-5992
             Project: Hadoop YARN
          Issue Type: Bug
          Components: scheduler
    Affects Versions: 3.0.0-alpha2
            Reporter: Pan Yuxuan


The visibility of interface {{AllocationFileLoaderService.Listener}} is changed from public to default by YARN-4997.
This may cause some downsteam  like Hive with compile error:
{noformat}
Hive/src/shims/scheduler/src/main/java/org/apache/hadoop/hive/schshim/FairSchedulerShim.java:[45,67] org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.AllocationFileLoaderService.Listener is not public in org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.AllocationFileLoaderService; cannot be accessed from outside package
{noformat}
org/apache/hadoop/hive/schshim/FairSchedulerShim.java uses the interface like below:
{noformat}
allocsLoader.setReloadListener(new AllocationFileLoaderService.Listener() {
      @Override
      public void onReload(AllocationConfiguration allocs) {
        allocConf.set(allocs);
      }
    });
{noformat}
So can we revert the visibility of {{AllocationFileLoaderService.Listener}} to public so that the downstream can use the interface as before, otherwise, the downstream should make some changes.



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