diff --git a/apps/emqx_data_bridge/etc/emqx_data_bridge.conf b/apps/emqx_data_bridge/etc/emqx_data_bridge.conf
index 50f09b8dd..0ca529699 100644
--- a/apps/emqx_data_bridge/etc/emqx_data_bridge.conf
+++ b/apps/emqx_data_bridge/etc/emqx_data_bridge.conf
@@ -3,124 +3,124 @@
 ##--------------------------------------------------------------------
 
 emqx_data_bridge.bridges: [
-    {name: "mysql"
-     type: mysql
-     config: {
-        server: "192.168.0.172:3306"
-        database: mqtt
-        pool_size: 1
-        username: root
-        password: public
-        auto_reconnect: true
-        ssl: false
-     }
-    }
-   , {name: "pgsql"
-     type: pgsql
-     config: {
-        server: "192.168.0.172:5432"
-        database: mqtt
-        pool_size: 1
-        username: root
-        password: public
-        auto_reconnect: true
-        ssl: false
-     }
-    }
-   , {name: "mongodb_single"
-     type: mongo
-     config: {
-        servers: "192.168.0.172:27017"
-        mongo_type: single
-        pool_size: 1
-        login: root
-        password: public
-        auth_source: mqtt
-        database: mqtt
-        ssl: false
-     }
-    }
-   #  ,{name: "mongodb_rs"
-   #   type: mongo
-   #   config: {
-   #      servers: "127.0.0.1:27017"
-   #      mongo_type: rs
-   #      rs_set_name: rs_name
-   #      pool_size: 1
-   #      login: root
-   #      password: public
-   #      auth_source: mqtt
-   #      database: mqtt
-   #      ssl: false
-   #   }
-   #  }
-   #  ,{name: "mongodb_shared"
-   #   type: mongo
-   #   config: {
-   #      servers: "127.0.0.1:27017"
-   #      mongo_type: shared
-   #      pool_size: 1
-   #      login: root
-   #      password: public
-   #      auth_source: mqtt
-   #      database: mqtt
-   #      ssl: false
-   #      max_overflow: 1
-   #      overflow_ttl:
-   #      overflow_check_period: 10s
-   #      local_threshold_ms: 10s
-   #      connect_timeout_ms: 10s
-   #      socket_timeout_ms: 10s
-   #      server_selection_timeout_ms: 10s
-   #      wait_queue_timeout_ms: 10s
-   #      heartbeat_frequency_ms: 10s
-   #      min_heartbeat_frequency_ms: 10s
-   #   }
-   #  }
-   , {name: "redis_single"
-     type: redis
-     config: {
-        servers: "192.168.0.172:6379"
-        redis_type: single
-        pool_size: 1
-        database: 0
-        password: public
-        auto_reconnect: true
-        ssl: false
-     }
-    }
-   #  ,{name: "redis_sentinel"
-   #   type: redis
-   #   config: {
-   #      servers: "127.0.0.1:6379, 127.0.0.2:6379, 127.0.0.3:6379"
-   #      redis_type: sentinel
-   #      sentinel_name: mymaster
-   #      pool_size: 1
-   #      database: 0
-   #      ssl: false
-   #   }
-   #  }
-   #  ,{name: "redis_cluster"
-   #   type: redis
-   #   config: {
-   #      servers: "127.0.0.1:6379, 127.0.0.2:6379, 127.0.0.3:6379"
-   #      redis_type: cluster
-   #      pool_size: 1
-   #      database: 0
-   #      password: "public"
-   #      ssl: false
-   #   }
-   #  }
-   , {name: "ldap"
-     type: ldap
-     config: {
-        servers: "192.168.0.172"
-        port: 389
-        bind_dn: "cn=root,dc=emqx,dc=io"
-        bind_password: "public"
-        timeout: 30s
-        pool_size: 1
-        ssl: false
-     }
-    }
+#    {name: "mysql"
+#     type: mysql
+#     config: {
+#        server: "192.168.0.172:3306"
+#        database: mqtt
+#        pool_size: 1
+#        username: root
+#        password: public
+#        auto_reconnect: true
+#        ssl: false
+#     }
+#    }
+#   , {name: "pgsql"
+#     type: pgsql
+#     config: {
+#        server: "192.168.0.172:5432"
+#        database: mqtt
+#        pool_size: 1
+#        username: root
+#        password: public
+#        auto_reconnect: true
+#        ssl: false
+#     }
+#    }
+#   , {name: "mongodb_single"
+#     type: mongo
+#     config: {
+#        servers: "192.168.0.172:27017"
+#        mongo_type: single
+#        pool_size: 1
+#        login: root
+#        password: public
+#        auth_source: mqtt
+#        database: mqtt
+#        ssl: false
+#     }
+#    }
+#  ,{name: "mongodb_rs"
+#   type: mongo
+#   config: {
+#      servers: "127.0.0.1:27017"
+#      mongo_type: rs
+#      rs_set_name: rs_name
+#      pool_size: 1
+#      login: root
+#      password: public
+#      auth_source: mqtt
+#      database: mqtt
+#      ssl: false
+#   }
+#  }
+#  ,{name: "mongodb_shared"
+#   type: mongo
+#   config: {
+#      servers: "127.0.0.1:27017"
+#      mongo_type: shared
+#      pool_size: 1
+#      login: root
+#      password: public
+#      auth_source: mqtt
+#      database: mqtt
+#      ssl: false
+#      max_overflow: 1
+#      overflow_ttl:
+#      overflow_check_period: 10s
+#      local_threshold_ms: 10s
+#      connect_timeout_ms: 10s
+#      socket_timeout_ms: 10s
+#      server_selection_timeout_ms: 10s
+#      wait_queue_timeout_ms: 10s
+#      heartbeat_frequency_ms: 10s
+#      min_heartbeat_frequency_ms: 10s
+#   }
+#  }
+#  , {name: "redis_single"
+#    type: redis
+#    config: {
+#       servers: "192.168.0.172:6379"
+#       redis_type: single
+#       pool_size: 1
+#       database: 0
+#       password: public
+#       auto_reconnect: true
+#       ssl: false
+#    }
+#   }
+#  ,{name: "redis_sentinel"
+#   type: redis
+#   config: {
+#      servers: "127.0.0.1:6379, 127.0.0.2:6379, 127.0.0.3:6379"
+#      redis_type: sentinel
+#      sentinel_name: mymaster
+#      pool_size: 1
+#      database: 0
+#      ssl: false
+#   }
+#  }
+#  ,{name: "redis_cluster"
+#   type: redis
+#   config: {
+#      servers: "127.0.0.1:6379, 127.0.0.2:6379, 127.0.0.3:6379"
+#      redis_type: cluster
+#      pool_size: 1
+#      database: 0
+#      password: "public"
+#      ssl: false
+#   }
+#  }
+#  , {name: "ldap"
+#    type: ldap
+#    config: {
+#       servers: "192.168.0.172"
+#       port: 389
+#       bind_dn: "cn=root,dc=emqx,dc=io"
+#       bind_password: "public"
+#       timeout: 30s
+#       pool_size: 1
+#       ssl: false
+#    }
+#   }
 ]