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The exception shifting performed by the Task class is meant to protect the TaskManager run method from encountering any exceptions done in the course of running a task. This is especially important for subclasses of TaskManager which implement alternate run strategies. The exception is shifted so that it is raised by the Task.wait method. In a multi-thread environment, it is the caller of the submit_task method which should receive the exception, and therefore it is submit_task which should call Task.wait. Currently it is the _run_task method which calls Task.wait, which means the TaskManager itself receives the exception. Change-Id: I3a6e61601164811fdd255ae54470011768c99a7d |
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