bugfix: cmake copy plasma java lib from lib64 directory in centos (#2885)

test/runtest.py

@@ -2524,6 +2524,8 @@ class GlobalStateAPI(unittest.TestCase):
 
             if tables_ready:
                 break
+            # this test case is blocked sometimes, add this may fix the problem
+            time.sleep(0.1)
 
         # Flush the tables.
         ray.experimental.flush_redis_unsafe()
@@ -2537,6 +2539,7 @@ class GlobalStateAPI(unittest.TestCase):
         ray.get([f.remote() for _ in range(10)])
 
         while len(ray.global_state.task_table()) != 0:
+            time.sleep(0.1)
             ray.experimental.flush_finished_tasks_unsafe()
 
         # Make sure that we can call this method (but it won't do anything in