we are using Pega Version 8.1.4 and Server is Tomcat. we are getting this error only in production and in Lower Envs its working fine. 

ERROR vos.drillzone.com|10.207.32.100  - 10.207.32.100: com.pega.pegarules.pub.context.RequestorLockException

com.pega.pegarules.pub.context.RequestorLockException: Unable to synchronize on requestor HRJB3W7N0E9P5E30WXHGOYLH54MFUPGH2A within 120 seconds: (thisThread = https-jsse-nio-443-exec-3) (originally locked by = https-jsse-nio-443-exec-15) (finally locked by = https-jsse-nio-443-exec-15)