[IMPALA-5958] Remove duplication of 'yarn-extras' AllocationFileLoaderService

• Type: Improvement
• Status: Resolved
• Priority: Trivial
• Resolution: Later
• Affects Version/s: Impala 2.11.0
• Component/s: Frontend
• Labels: admission-control ramp-up
• Target Version: Product Backlog
• Epic Color: ghx-label-3
• Assignee: Unassigned
• Reporter: Matthew Jacobs
• Created: 19/Sep/17 16:53
• Updated: 05/Dec/18 23:49
• Resolved: 05/Dec/18 23:49

Description

In IMPALA-5920, some Yarn code that is used by Impala admission control is brought into the Impala codebase.

In the code review, zamsden pointed out that the AllocationFileLoaderService thread for monitoring the fair-scheduler.xml file for changes could be removed if the RequestPoolService used the impala.util.FileWatcherService. See https://gerrit.cloudera.org/#/c/8035/4/common/yarn-extras/src/main/java/org/apache/impala/yarn/server/resourcemanager/scheduler/fair/AllocationFileLoaderService.java@103