1.) Create simple Start->ManualTask->End process and save it.
2.) Build&deploy the project.
3.) Go to process definitions and start the process, you'll get:
Process Instances failed to start: [project1.ManualTask1:3 - :2] -- Could not find work item handler for Manual Task
For the default designer pallette, all items should be easy to use out of the box. So for example DoNothingWorkItemHandler could be registered by default in the business central runtime session to prevent such error message.
Workaround and is to add this line
"Manual Task": new org.jbpm.process.instance.impl.demo.SystemOutWorkItemHandler()
to file business-central.war/WEB-INF/classes/META-INF/CustomWorkItemHandlers.conf
Possible solution could be implementation of a new handler, which would call just manager.completeWorkItem() operation without any additional outputs. DoNothingWorkItem handler calls nothing and just hangs the process, so it wouldn't be suitable as a solution.
Still happens in 6.2.0.GA. Should this be considered in next release or is it irrelevant and should be closed? Thanks.
After speaking with Maciej we agreed that there will always be some tasks which do not have default handler (e.g. manual task, email task). So I am closing it as not a bug.