TaskCancellation (#7669)

* Smol comment

* WIP, not passing ray.init

* Fixed small problem

* wip

* Pseudo interrupt things

* Basic prototype operational

* correct proc title

* Mostly done

* Cleanup

* cleaner raylet error

* Cleaning up a few loose ends

* Fixing Race Conds

* Prelim testing

* Fixing comments and adding second_check for kill

* Working_new_impl

* demo_ready

* Fixing my english

* Fixing a few problems

* Small problems

* Cleaning up

* Response to changes

* Fixing error passing

* Merged to master

* fixing lock

* Cleaning up print statements

* Format

* Fixing Unit test build failure

* mock_worker fix

* java_fix

* Canel

* Switching to Cancel

* Responding to Review

* FixFormatting

* Lease cancellation

* FInal comments?

* Moving exist check to CoreWorker

* Fix Actor Transport Test

* Fixing task manager test

* chaning clock repr

* Fix build

* fix white space

* lint fix

* Updating to medium size

* Fixing Java test compilation issue

* lengthen bad timeouts

python/ray/includes/libcoreworker.pxd

@@ -97,6 +97,7 @@ cdef extern from "ray/core_worker/core_worker.h" nogil:
         CRayStatus KillActor(
             const CActorID &actor_id, c_bool force_kill,
             c_bool no_reconstruction)
+        CRayStatus CancelTask(const CObjectID &object_id, c_bool force_kill)
 
         unique_ptr[CProfileEvent] CreateProfileEvent(
             const c_string &event_type)
@@ -214,6 +215,7 @@ cdef extern from "ray/core_worker/core_worker.h" nogil:
         c_bool ref_counting_enabled
         c_bool is_local_mode
         int num_workers
+        (c_bool() nogil) kill_main
         CCoreWorkerOptions()
 
     cdef cppclass CCoreWorkerProcess "ray::CoreWorkerProcess":

python/ray/includes/unique_ids.pxd

@@ -122,6 +122,8 @@ cdef extern from "ray/common/id.h" namespace "ray" nogil:
         CTaskID ForNormalTask(CJobID job_id, CTaskID parent_task_id,
                               int64_t parent_task_counter)
 
+        CActorID ActorId() const
+
     cdef cppclass CObjectID" ray::ObjectID"(CBaseID[CObjectID]):
 
         @staticmethod

python/ray/includes/unique_ids.pxi

@@ -220,6 +220,9 @@ cdef class TaskID(BaseID):
     def is_nil(self):
         return self.data.IsNil()
 
+    def actor_id(self):
+        return ActorID(self.data.ActorId().Binary())
+
     cdef size_t hash(self):
         return self.data.Hash()