You will get an unknown resource fault when you try to perform some operation on a resource which is not available. The reason might be one of the following:
- Domain does not exist where you configure your worker. Register the domain using the service API or console to fix this.
- You try to create a workflow execution or activity tasks of types which are not registered. You must register workers with their types at least once before attempting to start executions.
- A worker attempts to complete a task which timed out. To fix this, you should consider adjusting the timeout. To achieve this, you should register a new version of the activity type.
