fix: cache_admin start fail on cpu env

mindspore/ccsrc/pipeline/jit/init.cc

@@ -303,8 +303,10 @@ PYBIND11_MODULE(_c_expression, m) {
       mindspore::pipeline::ClearResAtexit();
 
 #ifdef ENABLE_MINDDATA
+      MS_LOG(WARNING) << "Start releasing dataset handles...";
       py::module iterators = py::module::import("mindspore.dataset.engine.iterators");
       (void)iterators.attr("_cleanup")();
+      MS_LOG(WARNING) << "End release dataset handles.";
 #endif
     }
   }});

mindspore/dataset/engine/cache_admin.py

@@ -36,4 +36,8 @@ def main():
     python_lib_dir = os.path.join(os.path.dirname(mindspore.__file__), "../../..")
     os.environ['LD_LIBRARY_PATH'] = python_lib_dir + ":" + os.environ.get('LD_LIBRARY_PATH')
 
+    # LD_PRELOAD libnnacl.so
+    nnacl_lib = os.path.join(os.path.dirname(mindspore.__file__), "lib/libnnacl.so")
+    os.environ['LD_PRELOAD'] = nnacl_lib
+
     sys.exit(subprocess.call([cache_admin] + sys.argv[1:], shell=False, env=os.environ))