[MESOS-7863] Agent may drop pending kill task status updates.

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 1.1.3, 1.2.3, 1.3.2, 1.4.0
• Component/s: agent
• Target Version/s: 1.1.3, 1.2.3, 1.3.2, 1.4.0
• Sprint: Mesosphere Sprint 60, Mesosphere Sprint 61, Mesosphere Sprint 62
• Story Points: 5
• Assignee: Benjamin Mahler
• Reporter: Benjamin Mahler
• Created: 05/Aug/17 02:15
• Updated: 28/Aug/17 14:18
• Resolved: 23/Aug/17 22:32

Description

Currently there is an assumption that when a pending task is killed, the framework will still be stored in the agent. However, this assumption can be violated in two cases:

1. Another pending task was killed and we removed the framework in 'Slave::run' thinking it was idle, because pending tasks were empty (we remove from pending tasks when processing the kill). (MESOS-7783 is an example instance of this).
2. The last executor terminated without tasks to send terminal updates for, or the last terminated executor received its last acknowledgement. At this point, we remove the framework thinking there were no pending tasks if the task was killed (removed from pending).

Issue Links

• relates to: MESOS-7783 Framework might not receive status update when a just launched task is killed immediately