The test failed on branch=master, cloud=gce:
test artifacts and logs in: /home/agent/work/.go/src/github.com/cockroachdb/cockroach/artifacts/follower-reads/survival=zone/locality=global/reads=exact-staleness/run_1
	follower_reads.go:657,follower_reads.go:319,follower_reads.go:57,test_runner.go:777: too many intervals with more than 2 nodes with low follower read ratios: 5 intervals > 4 threshold. Bad intervals:
		interval 09:44:40-09:44:50: n1 ratio: 0.601 n2 ratio: 0.000 n3 ratio: 1.000 n4 ratio: 0.000 n5 ratio: 2.430 n6 ratio: 1.000 
		interval 09:44:50-09:45:00: n1 ratio: 0.000 n2 ratio: 0.658 n3 ratio: 1.000 n4 ratio: 0.000 n5 ratio: 2.441 n6 ratio: 1.000 
		interval 09:45:20-09:45:30: n1 ratio: 0.679 n2 ratio: 1.000 n3 ratio: 0.895 n4 ratio: 0.000 n5 ratio: 2.430 n6 ratio: 1.000 
		interval 09:45:40-09:45:50: n1 ratio: 0.648 n2 ratio: 1.000 n3 ratio: 0.000 n4 ratio: 0.000 n5 ratio: 2.450 n6 ratio: 1.000 
		interval 09:45:50-09:46:00: n1 ratio: 0.000 n2 ratio: 1.000 n3 ratio: 0.768 n4 ratio: 0.000 n5 ratio: 2.430 n6 ratio: 1.000