YCSB error with tikv.type="txn"

gistfile1.txt

WARN[0295] get timestamp too slow: 38.616331ms
WARN[0295] get timestamp too slow: 39.112531ms
WARN[0295] get timestamp too slow: 39.07656ms
WARN[0295] get timestamp too slow: 39.113459ms
WARN[0295] get timestamp too slow: 38.523316ms
WARN[0295] get timestamp too slow: 39.075688ms
UPDATE - Takes(s): 299.9, Count: 3560011, OPS: 11869.6, Avg(us): 2116, Min(us): 1161, Max(us): 103265, 95th(us): 3000, 99th(us): 5000
UPDATE_ERROR - Takes(s): 299.9, Count: 118439, OPS: 394.9, Avg(us): 37319, Min(us): 716, Max(us): 132228, 95th(us): 95000, 99th(us): 100000
UPDATE - Takes(s): 309.9, Count: 3676459, OPS: 11862.4, Avg(us): 2118, Min(us): 1161, Max(us): 103265, 95th(us): 3000, 99th(us): 5000
UPDATE_ERROR - Takes(s): 309.9, Count: 122339, OPS: 394.7, Avg(us): 37320, Min(us): 716, Max(us): 132228, 95th(us): 95000, 99th(us): 100000
WARN[0311] get timestamp too slow: 39.95182ms
WARN[0311] get timestamp too slow: 39.956479ms
WARN[0311] get timestamp too slow: 40.009368ms
WARN[0311] get timestamp too slow: 38.788972ms
WARN[0311] get timestamp too slow: 40.038222ms
WARN[0311] get timestamp too slow: 39.172321ms
WARN[0311] get timestamp too slow: 39.286489ms
WARN[0311] get timestamp too slow: 39.311131ms
WARN[0311] get timestamp too slow: 39.277921ms
WARN[0311] get timestamp too slow: 39.502169ms
WARN[0311] get timestamp too slow: 38.663018ms
WARN[0311] get timestamp too slow: 39.120387ms
WARN[0311] get timestamp too slow: 39.883418ms
WARN[0311] get timestamp too slow: 36.527049ms
WARN[0311] get timestamp too slow: 40.02353ms
WARN[0311] get timestamp too slow: 34.310856ms
WARN[0311] get timestamp too slow: 39.925165ms