Seeing multiple thread dumps in the application

2022-08-04 10:32:55,788 [tp-nio-8080-exec-246] [          ] [                    ] [                    ] (ngineinterface.service.HttpAPI) ERROR sipega-kn-d1| Proprietary information hidden   - Proprietary information hidden: com.pega.pegarules.pub.context.RequestorLockException  com.pega.pegarules.pub.context.RequestorLockException: Unable to synchronize on requestor H***********************A within 120 seconds: (thisThread = http-xxx-xxxx-xxxx-246) (originally locked by = http-xxx-xxxx-xxxx-255) (finally locked by = http-xxx-xxxx-xxxx-255)      at com.pega.pegarules.session.internal.PRSessionProviderImpl.throwRequestorLockException(PRSessionProviderImpl.java:1573) ~[prprivate-session.jar:?]      at com.pega.pegarules.session.internal.PRSessionProviderImpl.getLockOnRequestor(PRSessionProviderImpl.java:1557) ~[prprivate-session.jar:?]      at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:1109) ~[prprivate-session.jar:?]      at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:977) ~[prprivate-session.jar:?]      at com.pega.pegarules.session.external.engineinterface.service.EngineAPI.processRequest(EngineAPI.java:368) ~[prenginext.jar:?]

This logs are seen from a week and we could see no custom code is referred in the logs.

Any leads on this would be highly appreciated