* Add a SWAP TaskQueue so that we can keep track of tasks that are temporarily dequeued
* Fix bug where tasks that fail to be forwarded don't appear to be local by adding them to SWAP queue
* cleanups
* updates
* updates
* remove mutable data in jni
fix flatbuffer string to ID check
* replace sizeof(ID) by ID.size()
sizeof(ID) = 20 if no other members in class
* fix new string unbounded
* code polished according to comments
* lazy hash eval
* Introduce set data structure in GCS. Change object table to Set instance.
* Fix a logic bug. Update python code.
* lint
* lint again
* Remove CURRENT_VALUE mode
* Remove 'CURRENT_VALUE'
* Add more test cases
* rename has_been_created to subscribed.
* Make `changed` parameter type of `bool *`
* Rename mode to notification_mode
* fix build
* RAY.SET_REMOVE return error if entry doesn't exist
* lint
* Address comments
* lint and fix build
* Use strongly typed IDs for C++.
* Avoid heap allocation in cython.
* Fix JNI part
* Fix rebase conflict
* Refine
* Remove type check from __init__
* Remove unused constructor declarations.
* Add the Delete function in GCS
* Unify BatchDelete and Delete
* Fix comment
* Lint
* Refine according to comments
* Unify test.
* Address comment
* C++ lint
* Update ray_redis_module.cc
* Avoid second copy of data for inlined objects
* Increase Wait timeout for valgrind tests
* Run object manager tests with and without inlined objects
* Fix test
* Implement Actor checkpointing
* docs
* fix
* fix
* fix
* move restore-from-checkpoint to HandleActorStateTransition
* Revert "move restore-from-checkpoint to HandleActorStateTransition"
This reverts commit 9aa4447c1e3e321f42a1d895d72f17098b72de12.
* resubmit waiting tasks when actor frontier restored
* add doc about num_actor_checkpoints_to_keep=1
* add num_actor_checkpoints_to_keep to Cython
* add checkpoint_expired api
* check if actor class is abstract
* change checkpoint_ids to long string
* implement java
* Refactor to delay actor creation publish until checkpoint is resumed
* debug, lint
* Erase from checkpoints to restore if task fails
* fix lint
* update comments
* avoid duplicated actor notification log
* fix unintended change
* add actor_id to checkpoint_expired
* small java updates
* make checkpoint info per actor
* lint
* Remove logging
* Remove old actor checkpointing Python code, move new checkpointing code to FunctionActionManager
* Replace old actor checkpointing tests
* Fix test and lint
* address comments
* consolidate kill_actor
* Remove __ray_checkpoint__
* fix non-ascii char
* Loosen test checks
* fix java
* fix sphinx-build
