cannot use moveit! with dual_ur5 platform

Hello everyone! I'm using moveit! package to do motion planning on real dual_ur5 platform.I can ping both the IP adresses of the two arms.All config plugins may work well (like the .yaml files).But the warning occured when I run a Python file with moveit commander：**[ WARN] [1508121443.319273668]: Failed to validate trajectory: couldn't receive full current joint state within 1s**. **My bringup.launch:** ---------- **controllers.yaml in moveit_config package**: controller_list: - name: "left" action_ns: left_follow_joint_trajectory type: FollowJointTrajectory joints: - left_shoulder_pan_joint - left_shoulder_lift_joint - left_elbow_joint - left_wrist_1_joint - left_wrist_2_joint - left_wrist_3_joint - name: "right" action_ns: right_follow_joint_trajectory type: FollowJointTrajectory joints: - right_shoulder_pan_joint - right_shoulder_lift_joint - right_elbow_joint - right_wrist_1_joint - right_wrist_2_joint - right_wrist_3_joint ---------- **The warning in the terminal after runnning the python file:** [ INFO] [1508121442.292992289]: Planning request received for MoveGroup action. Forwarding to planning pipeline. [ INFO] [1508121442.293298977]: No optimization objective specified, defaulting to PathLengthOptimizationObjective [ INFO] [1508121442.293327316]: No planner specified. Using default. [ INFO] [1508121442.293420818]: RRTConnect: Starting planning with 1 states already in datastructure [ INFO] [1508121442.314419323]: RRTConnect: Created 4 states (2 start + 2 goal) [ INFO] [1508121442.314442216]: Solution found in 0.021074 seconds [ INFO] [1508121442.314505058]: SimpleSetup: Path simplification took 0.000045 seconds and changed from 3 to 2 states [ INFO] [1508121442.317369505]: Received new trajectory execution service request... ***[ WARN] [1508121443.319273668]: Failed to validate trajectory: couldn't receive full current joint state within 1s [ INFO] [1508121443.319330948]: Execution completed: ABORTED***