[MESOS-9541] Transition agent operations to some "lost" state when the agent is removed.

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.5.0, 1.5.1, 1.5.2, 1.6.0, 1.6.1, 1.7.0, 1.7.1
• Labels: foundations mesosphere
• Epic Link: Operation Feedback Improvements
• Sprint: Mesos Foundations RI10 Sp 39
• Story Points: 5
• Assignee: Greg Mann
• Reporter: Chun-Hung Hsiao
• Shepherd: Gastón Kleiman
• Created: 29/Jan/19 00:26
• Updated: 05/Apr/19 16:59

Description

MESOS-8782 and MESOS-8783 transition operations to OPERATION_GONE_BY_OPERATOR or OPERATION_UNREACHABLE when their agents are marked as gone or unreachable respectively. However, there are other cases where agents can be "removed" and forgot by the master:
1) When an agent tries to register with a new ID from the same IP:
https://github.com/apache/mesos/blob/f130544bdb8a9849096ee2cb35ebcbc7d8a326d8/src/master/master.cpp#L6836-L6849
2) When an agent requests to unregister:
https://github.com/apache/mesos/blob/f130544bdb8a9849096ee2cb35ebcbc7d8a326d8/src/master/master.cpp#L7817-L7840

In these tasks, the master explicitly sends TASK_LOST for task status updates (this also means that this documentation is wrong), but does nothing for operations. We should design proper operation status transitions for these cases.

Issue Links

• is blocked by: MESOS-9556 Establish a well-defined agent state diagram
• is related to: MESOS-9546 Operation status is not updated in master when agent is marked as unreachable or gone