[MESOS-8942] Master streaming API does not send (health) check updates for tasks.

• Type: Task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.4.1, 1.5.0, 1.6.0
• Fix Version/s: 1.4.2, 1.5.2, 1.6.1, 1.7.0
• Component/s: HTTP API
• Labels: api mesosphere streaming-api
• Target Version/s: 1.4.2, 1.5.2, 1.6.1, 1.7.0
• Sprint: Mesosphere Sprint 2018-20, Mesosphere Sprint 2018-21
• Story Points: 2
• Assignee: Alex R
• Reporter: Alex R
• Shepherd: Zhitao Li
• Created: 22/May/18 20:57
• Updated: 11/Jun/18 11:53
• Resolved: 04/Jun/18 14:52

Description

Currently, Master API subscribers get task status updates when task state changes (the actual logic is slightly more complex). We use task status updates to deliver health and check information to schedulers, in which case task state does not change. Hence these updates are filtered out and the subscribers do not get any task health updates.

Here is a test that confirms the described behaviour: https://gist.github.com/rukletsov/c079d95479fb134d137ea3ae8b7ae874