Klaus Ma created MESOS-4442:
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Summary: Resource maybe over-offered if estimator shrunk un-used
resources.
Key: MESOS-4442
URL: https://issues.apache.org/jira/browse/MESOS-4442
Project: Mesos
Issue Type: Bug
Components: master
Reporter: Klaus Ma
Assignee: Klaus Ma
Here's the time sequence of this issue:
T1: in cluster, {{cpus=2}}: one is revocable and the other one is nonRevocable
T2: framework1 get offer {{cpus=2}}, but did NOT launch tasks
T3: Estimator update empty resources; slave.total is updated to cpus=1 in
{{HierarchicalAllocatorProcess::updateSlave}}
T4: in {{allocate()}}, slave.total (cpus=1) < slave.allocated (cpus=2), the
resources cpus=1 will re-offer to framework because {{operator-}} will return
first item if {{subtractable()}} is false.
At T4, the state of allocator is in-correct (slave.total > slave.allocated).
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