[core] Option to fallback to LRU on OutOfMemory (#7410)

* Add a test for LRU fallback

* Update error message

* Upgrade arrow to master

* Integrate with arrow

* Revert "Bazel mirrors (#7385)"

This reverts commit 44aded5272.

* Don't LRU evict

* Revert "Revert "Bazel mirrors (#7385)""

This reverts commit b6359fea78d1bd3925452ca88ac71e0c9e5c7dd3.

* Add lru_evict flag

* fix internal config

* Fix

* upgrade arrow

* debug

* Set free period in config for lru_evict, override max retries to fix
test

* Fix test?

* fix test

* Revert "debug"

This reverts commit 98f01c63a267f38218f5047b1866e4c1c8280017.

* fix exception str

* Fix ref count test

* Shorten travis test?

python/ray/cluster_utils.py

@@ -1,3 +1,4 @@
+import json
 import logging
 import time
 
@@ -77,6 +78,9 @@ class Cluster:
             "num_gpus": 0,
             "object_store_memory": 150 * 1024 * 1024,  # 150 MiB
         }
+        if "_internal_config" in node_args:
+            node_args["_internal_config"] = json.loads(
+                node_args["_internal_config"])
         ray_params = ray.parameter.RayParams(**node_args)
         ray_params.update_if_absent(**default_kwargs)
         if self.head_node is None: