[TEZ-2792] Add AM web service API for tasks.

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.7.1, 0.8.1-alpha
• Component/s: UI
• Assignee: Sreenath Somarajapuram
• Reporter: Sreenath Somarajapuram
• Created: 09/Sep/15 11:24
• Updated: 12/Oct/15 20:46
• Resolved: 11/Sep/15 18:22

Description

Add AM API for fetching realtime tasks info:

• API endpoint : /ws/v2/tez/tasksInfo
• Query Params:
  • dagID: Just need to pass the dagIndex, (mandatory).
  • vertexID: Just need to pass the vertexIndex. Can be a comma separated list
  • taskID: Must be of the format <vertexIndex>_<taskIndex>. For instance task with index 5 in vertex 3 can be referenced using the id 3_5. Can be a comma separated list.
  • limit: Maximum number of items to be returned (Defaults to 100).
• If taskID is passed: All (capped by limit) the specified tasks will be returned. vertexID if present wont be considered.
• IF vertexID is passed: All (capped by limit) tasks under the vertices will be returned.
• If just dagID is passed: All (capped by limit) tasks under the DAG will be returned.
• Data returned: complete task id, progress, status

Issue Links

• is depended upon by: TEZ-2780 Tez UI: Update All Tasks page while in progress.
• is depended upon by: TEZ-2812 Tez UI: Update task & attempt tables while in progress.