Temporarily disable bulk operations b/c old mongo

does too much work on exit and doesn't handle nesting

common/lib/xmodule/xmodule/modulestore/__init__.py

@@ -566,6 +566,14 @@ class ModuleStoreReadBase(ModuleStoreRead):
         finally:
             self._end_bulk_operation(course_id)
 
+    @contextmanager
+    def bulk_temp_noop_operations(self, course_id):
+        """
+        A hotfix noop b/c old mongo does not properly handle nested bulk operations and does unnecessary work
+        if the bulk operation only reads data. Replace with bulk_operations once fixed (or don't merge to master)
+        """
+        yield
+
     def _begin_bulk_operation(self, course_id):
         """
         Begin a bulk write operation on course_id.

common/lib/xmodule/xmodule/modulestore/search.py

@@ -68,7 +68,8 @@ def path_to_location(modulestore, usage_key):
             newpath = (next_usage, path)
             queue.append((parent, newpath))
 
-    with modulestore.bulk_operations(usage_key.course_key):
+    # FIXME replace with bulk_operations once it's fixed for old mongo
+    with modulestore.bulk_temp_noop_operations(usage_key.course_key):
         if not modulestore.has_item(usage_key):
             raise ItemNotFoundError(usage_key)
 

common/lib/xmodule/xmodule/modulestore/tests/test_mixed_modulestore.py

@@ -714,7 +714,8 @@ class TestMixedModuleStore(unittest.TestCase):
     # TODO: LMS-11220: Document why draft send count is 5
     # TODO: LMS-11220: Document why draft find count is [19, 6]
     # TODO: LMS-11220: Document why split find count is [2, 2]
-    @ddt.data(('draft', [19, 6], 0), ('split', [2, 2], 0))
+#     @ddt.data(('draft', [19, 6], 0), ('split', [2, 2], 0))
+    @ddt.data(('draft', [18, 6], 0), ('split', [16, 2], 0))  # FIXME, replace w/ above when bulk reenabled
     @ddt.unpack
     def test_path_to_location(self, default_ms, num_finds, num_sends):
         """