[MESOS-8111] Mesos sees task as running, but cannot kill it because the agent is offline

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 1.2.3
• Component/s: master

Environment

DC/OS 1.9.4

• Assignee: Vinod Kone
• Reporter: Cosmin Lehene
• Created: 18/Oct/17 17:05
• Updated: 14/Nov/17 00:01
• Resolved: 14/Nov/17 00:01

Description

After scaling down a cluster, the master is reporting a task as running although the slave has been long gone.
At the same time it reports it can't kill it because the agent is offline

I1018 16:55:22.000000  6976 master.cpp:4913] Processing KILL call for task 'spark.7b59a77b-b353-11e7-addd-b29ecbf071e1' of framework 4d2a982a-0e62-4471-88e8-8df9cc0ae437-0001 (marathon) at scheduler-45eafb76-4510-482e-9bcc-06e3ad97c276@172.16.0.7:15101
W1018 16:55:22.000000  6976 master.cpp:5000] Cannot kill task spark.7b59a77b-b353-11e7-addd-b29ecbf071e1 of framework 4d2a982a-0e62-4471-88e8-8df9cc0ae437-0001 (marathon) at scheduler-45eafb76-4510-482e-9bcc-06e3ad97c276@172.16.0.7:15101 because the agent 4d2a982a-0e62-4471-88e8-8df9cc0ae437-S129 at slave(1)@10.0.0.81:5051 (10.0.0.81) is disconnected. Kill will be retried if the agent re-registers

Clearly, if the agent is offline the task is also not running. Also not sure waiting indefinitely for an agent to recover is a good strategy.