The test failed on branch=master, cloud=gce:
test artifacts and logs in: /home/agent/work/.go/src/github.com/cockroachdb/cockroach/artifacts/decommission/mixed-versions/run_1
	versionupgrade.go:281,versionupgrade.go:386,retry.go:197,versionupgrade.go:385,versionupgrade.go:189,mixed_version_decommission.go:96,decommission.go:73,test_runner.go:760: pq: operation "show cluster setting version" timed out after 2m0s: value differs between local setting ([18 8 8 20 16 2 24 0 32 14]) and KV ([18 8 8 20 16 2 24 0 32 0]); try again later (<nil> after 1m58.079161845s)

	cluster.go:1637,context.go:140,cluster.go:1626,test_runner.go:841: dead node detection: /home/agent/work/.go/src/github.com/cockroachdb/cockroach/bin/roachprod monitor teamcity-2564046-1610002658-09-n4cpu4 --oneshot --ignore-empty-nodes: exit status 1 1: 5596
		3: 5159
		4: 4908
		2: dead
		Error: UNCLASSIFIED_PROBLEM: 2: dead
		(1) UNCLASSIFIED_PROBLEM
		Wraps: (2) attached stack trace
		  -- stack trace:
		  | main.glob..func14
		  | 	/home/agent/work/.go/src/github.com/cockroachdb/cockroach/pkg/cmd/roachprod/main.go:1147
		  | main.wrap.func1
		  | 	/home/agent/work/.go/src/github.com/cockroachdb/cockroach/pkg/cmd/roachprod/main.go:271
		  | github.com/spf13/cobra.(*Command).execute
		  | 	/home/agent/work/.go/src/github.com/cockroachdb/cockroach/vendor/github.com/spf13/cobra/command.go:830
		  | github.com/spf13/cobra.(*Command).ExecuteC
		  | 	/home/agent/work/.go/src/github.com/cockroachdb/cockroach/vendor/github.com/spf13/cobra/command.go:914
		  | github.com/spf13/cobra.(*Command).Execute
		  | 	/home/agent/work/.go/src/github.com/cockroachdb/cockroach/vendor/github.com/spf13/cobra/command.go:864
		  | main.main
		  | 	/home/agent/work/.go/src/github.com/cockroachdb/cockroach/pkg/cmd/roachprod/main.go:1850
		  | runtime.main
		  | 	/usr/local/go/src/runtime/proc.go:204
		  | runtime.goexit
		  | 	/usr/local/go/src/runtime/asm_amd64.s:1374
		Wraps: (3) 2: dead
		Error types: (1) errors.Unclassified (2) *withstack.withStack (3) *errutil.leafError