6.5.0 stuck in warmup

Node in 6.5.0 CB cluster is stuck in warmup state after a os patch update. Tried looking in babysitter.log and error.log but couldn’t pin point the cause. Also, restarted cb server and rebooted the machine but warmup state won’t go away. How do I go about troubleshooting this problem?

Thank you

cbstats -u Administrator -p password -b my_bucket localhost:11210 warmup