If a free-style job using the PTC Windchill RV&S CM - Jenkins Plugin (integrity-plugin) 2.4 runs into a timeout exeception, it cannot be stopped other than by restarting the jenkins service on Windows. The message is:
Populating clean workspace...
18:24:13 A Timeout Exception was caught. Failed to checkout contents of file!
18:24:13 null*
18:24:13* Terminating checkout threads

(It seems that the plugin is caught in a lock-up situation, Restarted the service after there was no change at or around 18:41 respectiveky 6:41 PM).

Versions:
Jenkins v2.263.4
PTC Windchill RV&S CM - Jenkins Plugin (integrity-plugin): 2.4
SCM API Plugin (scm-api): 2.6.4
Pipeline: API (workflow-api): 2.41
Pipeline: Basic Steps (workflow-basic-steps): 2.23
Pipeline: Groovy (workflow-cps): 2.90
Pipeline: Nodes and Processes (workflow-durable-task-step): 2.38
Pipeline: Job (workflow-job): 2.40
Pipeline: Multibranch (workflow-multibranch): 2.22
Pipeline: SCM Step (workflow-scm-step): 2.12
Pipeline: Step API (workflow-step-api): 2.23
Pipeline: Supporting APIs (workflow-support): 3.8