[HIVE-17195] Long chain of tasks created by REPL LOAD shouldn't cause stack corruption.

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.1.0
• Fix Version/s: 3.0.0
• Component/s: HiveServer2, repl
• Labels: DAG DR Executor replication
• Assignee: Sankar Hariappan
• Reporter: Sankar Hariappan
• Created: 28/Jul/17 08:52
• Updated: 22/May/18 23:59
• Resolved: 16/Aug/17 18:01

Description

Currently, long chain REPL LOAD tasks lead to huge recursive calls when try to traverse the DAG.
For example, getMRTasks, getTezTasks, getSparkTasks and iterateTasks methods run recursively to traverse the DAG.
Need to modify this traversal logic to reduce stack usage.

Issue Links

• is related to: HIVE-17338 Utilities.get*Tasks multiple methods duplicate code
• links to: GitHub Pull Request #212