roachtest: tpccbench/nodes=12/cpu=16 failed

[cockroach-teamcity]

(roachtest).tpccbench/nodes=12/cpu=16 failed on master@baf34b241c9ee27530f0a3a988149bfd7cca3f6d:

		  | 	/home/agent/work/.go/src/github.com/cockroachdb/cockroach/pkg/util/search/search.go:43
		  | github.com/cockroachdb/cockroach/pkg/util/search.(*lineSearcher).Search
		  | 	/home/agent/work/.go/src/github.com/cockroachdb/cockroach/pkg/util/search/search.go:173
		  | main.runTPCCBench
		  | 	/home/agent/work/.go/src/github.com/cockroachdb/cockroach/pkg/cmd/roachtest/tpcc.go:783
		  | main.registerTPCCBenchSpec.func1
		  | 	/home/agent/work/.go/src/github.com/cockroachdb/cockroach/pkg/cmd/roachtest/tpcc.go:600
		  | main.(*testRunner).runTest.func2
		  | 	/home/agent/work/.go/src/github.com/cockroachdb/cockroach/pkg/cmd/roachtest/test_runner.go:760
		  | runtime.goexit
		  | 	/usr/local/go/src/runtime/asm_amd64.s:1374
		Wraps: (2) monitor failure
		Wraps: (3) unexpected node event: 7: dead
		Error types: (1) *withstack.withStack (2) *errutil.withPrefix (3) *errors.errorString

	cluster.go:1666,context.go:140,cluster.go:1655,test_runner.go:841: dead node detection: /home/agent/work/.go/src/github.com/cockroachdb/cockroach/bin/roachprod monitor teamcity-2604727-1611297564-02-n13cpu16 --oneshot --ignore-empty-nodes: exit status 1 13: skipped
		7: dead
		5: 9022
		12: 9143
		2: 9107
		8: 8897
		6: 9430
		3: 9109
		1: 9433
		11: 9030
		4: 9413
		9: 9240
		10: 9118
		Error: UNCLASSIFIED_PROBLEM: 7: 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:1852
		  | runtime.main
		  | 	/usr/local/go/src/runtime/proc.go:204
		  | runtime.goexit
		  | 	/usr/local/go/src/runtime/asm_amd64.s:1374
		Wraps: (3) 7: dead
		Error types: (1) errors.Unclassified (2) *withstack.withStack (3) *errutil.leafError

More

Artifacts: /tpccbench/nodes=12/cpu=16

See this test on roachdash
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[tbg]

Likely fix: #59370