Requestor Lock Exception

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)

There is an article describing how you can debug this:

It is often caused by a slow database operation. E.G:

@Ramachandra Facing the same issue after v842 upgrade, getting multiple error in log, dev region performance is impacted.

are you created any service request?

thank you John for sharing the details.

Mentioned fix in the above links are not working for me

@JohnPaulRaja,C [ The issue was mainly with DB so we have contacted our DB admins and they have fixed it from DB side. now we are not getting any error either in Dev or Prod.