v0.9.5: 'nomad alloc status -verbose' output inconsistency

[a-vorobiev]

Nomad version

v0.9.5 (1cbb2b9)

Operating system and Environment details

Debian GNU/Linux 10 (buster)

Issue

Placement Metrics order differs time to time when invoking the nomad alloc status -verbose command on the same job:

root@master:~# nomad alloc status -verbose 00e562bd
ID                  = 00e562bd-509b-47be-394c-0b809c1b2ca0
Eval ID             = 02e97805-2dc2-0777-d5be-4cc89fd4fd8f
Name                = example.cache[0]
Node ID             = 16a5491e-a3ed-8f4e-af18-e29e05f45b52
Node Name           = worker2
Job ID              = example
Job Version         = 824636459616
Client Status       = running
Client Description  = Tasks are running
Desired Status      = run
Desired Description = <none>
Created             = 2019-09-16T16:25:39Z
Modified            = 2019-09-16T16:27:46Z
Evaluated Nodes     = 3
Filtered Nodes      = 0
Exhausted Nodes     = 0
Allocation Time     = 99.769µs
Failures            = 0

Task "redis" is "running"
Task Resources
CPU        Memory           Disk     Addresses
5/500 MHz  912 KiB/256 MiB  300 MiB  db: 10.0.2.15:25694

Task Events:
Started At     = 2019-09-16T16:25:47Z
Finished At    = N/A
Total Restarts = 0
Last Restart   = N/A

Recent Events:
Time                  Type        Description
2019-09-16T16:25:47Z  Started     Task started by client
2019-09-16T16:25:40Z  Driver      Downloading image
2019-09-16T16:25:39Z  Task Setup  Building Task Directory
2019-09-16T16:25:39Z  Received    Task received by client

Placement Metrics
Node                                  node-affinity  binpack  job-anti-affinity  node-reschedule-penalty  final score
16a5491e-a3ed-8f4e-af18-e29e05f45b52  1              0.531    0                  0                        0.766
6fc7950f-6af1-001f-dc85-76690174e6a2  1              0.531    0                  0                        0.766
d711dc5e-20f5-fb6f-f227-2c91081672d2  0              0.531    0                  0                        0.531

root@master:~# nomad alloc status -verbose 00e562bd
ID                  = 00e562bd-509b-47be-394c-0b809c1b2ca0
Eval ID             = 02e97805-2dc2-0777-d5be-4cc89fd4fd8f
Name                = example.cache[0]
Node ID             = 16a5491e-a3ed-8f4e-af18-e29e05f45b52
Node Name           = worker2
Job ID              = example
Job Version         = 824635186144
Client Status       = running
Client Description  = Tasks are running
Desired Status      = run
Desired Description = <none>
Created             = 2019-09-16T16:25:39Z
Modified            = 2019-09-16T16:27:46Z
Evaluated Nodes     = 3
Filtered Nodes      = 0
Exhausted Nodes     = 0
Allocation Time     = 99.769µs
Failures            = 0

Task "redis" is "running"
Task Resources
CPU        Memory           Disk     Addresses
5/500 MHz  912 KiB/256 MiB  300 MiB  db: 10.0.2.15:25694

Task Events:
Started At     = 2019-09-16T16:25:47Z
Finished At    = N/A
Total Restarts = 0
Last Restart   = N/A

Recent Events:
Time                  Type        Description
2019-09-16T16:25:47Z  Started     Task started by client
2019-09-16T16:25:40Z  Driver      Downloading image
2019-09-16T16:25:39Z  Task Setup  Building Task Directory
2019-09-16T16:25:39Z  Received    Task received by client

Placement Metrics
Node                                  node-reschedule-penalty  node-affinity  binpack  job-anti-affinity  final score
16a5491e-a3ed-8f4e-af18-e29e05f45b52  0                        1              0.531    0                  0.766
6fc7950f-6af1-001f-dc85-76690174e6a2  0                        1              0.531    0                  0.766
d711dc5e-20f5-fb6f-f227-2c91081672d2  0                        0              0.531    0                  0.531

Placement Metrics table columns are printed out in different order.

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