Github user EronWright commented on the issue:
https://github.com/apache/flink/pull/5114
Log output showing a 'mixed' scenario, involving two tasks, combining
resources across the reserved and unreserved resources in a single offer.
```
Assigning resources: [cpus(myrole):2.0; mem(myrole):4096.0;
ports(myrole):[1025-2180];
ports(*):[2182-3887,3889-5049,5052-8079,8082-8180,8182-32000]; disk(*):28829.0;
cpus(*):2.0; mem(*):10766.0]
Processing task taskmanager-00002
Allocating 1.5 cpus
Taking 1.5 from cpus(myrole):2.0
Allocated: [cpus(myrole):1.5], unsatisfied: 0.0
Allocating 4096.0 mem
Taking 4096.0 from mem(myrole):4096.0
Allocated: [mem(myrole):4096.0], unsatisfied: 0.0
Allocating 2 ports
Taking [1025-1026] from ports(myrole):[1025-2180]
Allocated: [ports(myrole):[1025-1026]], unsatisfied: 0
Processing task taskmanager-00001
Allocating 1.5 cpus
Taking 0.5 from cpus(myrole):0.5
Taking 1.0 from cpus(*):2.0
Allocated: [cpus(myrole):0.5; cpus(*):1.0], unsatisfied: 0.0
Allocating 4096.0 mem
Taking 4096.0 from mem(*):10766.0
Allocated: [mem(*):4096.0], unsatisfied: 0.0
Allocating 2 ports
Taking [1027-1028] from ports(myrole):[1027-2180]
Allocated: [ports(myrole):[1027-1028]], unsatisfied: 0
Remaining resources: [ports(myrole):[1029-2180];
ports(*):[2182-3887,3889-5049,5052-8079,8082-8180,8182-32000]; disk(*):28829.0;
cpus(*):1.0; mem(*):6670.0]
```---
