neutron初始化数据不行，是什么问题？

sh -c 'neutron-db-manage --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugin.ini upgrade head' neutron
No handlers could be found for logger "neutron.quota"
Traceback (most recent call last):
  File "/usr/bin/neutron-db-manage", line 10, in <module>
    sys.exit(main())
  File "/usr/lib/python2.7/site-packages/neutron/db/migration/cli.py", line 565, in main
    CONF.command.func(config, CONF.command.name)
  File "/usr/lib/python2.7/site-packages/neutron/db/migration/cli.py", line 194, in do_upgrade
    run_sanity_checks(config, revision)
  File "/usr/lib/python2.7/site-packages/neutron/db/migration/cli.py", line 552, in run_sanity_checks
    script_dir.run_env()
  File "/usr/lib/python2.7/site-packages/alembic/script/base.py", line 397, in run_env
    util.load_python_file(self.dir, 'env.py')
  File "/usr/lib/python2.7/site-packages/alembic/util/pyfiles.py", line 81, in load_python_file
    module = load_module_py(module_id, path)
  File "/usr/lib/python2.7/site-packages/alembic/util/compat.py", line 79, in load_module_py
    mod = imp.load_source(module_id, path, fp)
  File "/usr/lib/python2.7/site-packages/neutron/db/migration/alembic_migrations/env.py", line 135, in <module>
    run_migrations_online()
  File "/usr/lib/python2.7/site-packages/neutron/db/migration/alembic_migrations/env.py", line 114, in run_migrations_online
    engine = session.create_engine(neutron_config.database.connection)
  File "/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/engines.py", line 112, in create_engine
    url = sqlalchemy.engine.url.make_url(sql_connection)
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/url.py", line 186, in make_url
    return _parse_rfc1738_args(name_or_url)
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/url.py", line 235, in _parse_rfc1738_args
    "Could not parse rfc1738 URL from string '%s'" % name)
sqlalchemy.exc.ArgumentError: Could not parse rfc1738 URL from string ''
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connection可能有问题，检测下配置文件，是否有下面字符[mw_shl_code=bash,true]rfc1738 [/mw_shl_code]