The system property org.jbpm.rm.init.timer is not mentioned in any of our document.

The property takes a boolean value to tell the jbpm engine whether it needs to initialize loading the timer instances or not.

One important note is, if ejb timer service is being used, the system property org.jbpm.rm.init.timer must be set as false to avoid the initial load. Otherwise, it may cause transaction timeout issue in some application server such as Webshpere Application Server(WAS).
Currently, this is not true. I've raised a jira https://issues.jboss.org/browse/RHBA-611 to address the issue.

In summary, our documentation should
1. mention this system property. and explain what it means.
2. emphasize that when ejb timer service is being used the value must be set as false. This should be handled by jbpm engine code.