"dcos task --completed" fails if agents were removed from the cluster

[disrani-px]

What version of DC/OS + DC/OS CLI are you using (dcos --version)?

dcoscli.version=0.4.15
dcos.version=1.9.0
dcos.commit=0ce03387884523f02624d3fb56c7fbe2e06e181b
dcos.bootstrap-id=58fd0833ce81b6244fc73bf65b5deb43217b0bd

What operating system and version are you using?

CoreOS

What did you do?

Created a DCOS cluster on AWS using CloudFormation. Killed agent nodes, new agent nodes were started by ASG which came up as different nodes.

When I run "dcos task --completed" it seems to be querying for the failed nodes.

What did you expect to see?

List of completed tasks from nodes that are up.

What did you see instead?

$ dcos task --completed
No slave found with ID "01d86b9c-ca2c-4c3c-9d9f-d3a3ef3e3911-S2".

$ dcos node
HOSTNAME IP ID
10.0.0.135 10.0.0.135 5c6438b2-1f63-4c23-b62a-ad0a7d354a91-S3
10.0.0.179 10.0.0.179 5c6438b2-1f63-4c23-b62a-ad0a7d354a91-S6
10.0.1.167 10.0.1.167 01d86b9c-ca2c-4c3c-9d9f-d3a3ef3e3911-S4
10.0.1.210 10.0.1.210 5c6438b2-1f63-4c23-b62a-ad0a7d354a91-S7
10.0.1.221 10.0.1.221 5c6438b2-1f63-4c23-b62a-ad0a7d354a91-S8
10.0.6.234 10.0.6.234 01d86b9c-ca2c-4c3c-9d9f-d3a3ef3e3911-S5