Hi, I am trying to study the actionlib, I got the error in th client:

> Got a result when we were already in the DONE state

also I got another warn when I rosrun the client in the server:

[WARN] [WallTime: 1474144592.373342] Inbound TCP/IP connection failed: connection from sender terminated before handshake header received. 0 bytes were received. Please check sender for additional details.

Sometimes it retuns the good result and sometimes not.

I really want to figure out why that happens. I attached the code below:

fancyactionclient.py:

import rospy

import time

import actionlib

from talker_listern.msg import TimerAction, TimerFeedback, TimerGoal, TimerResult

def feedback_cb(feedback):
    print ('[feedback] Time elapsed: %f'%(feedback.time_elapsed.to_sec()))
    print ('[feedback] Time remaining: %f'%(feedback.time_remaining.to_sec()))


rospy.init_node('timer_action_client')

client = actionlib.SimpleActionClient('timer', TimerAction)
client.wait_for_server()


goal = TimerGoal()
goal.time_to_wait = rospy.Duration.from_sec(5.0)
client.send_goal(goal,feedback_cb=feedback_cb)
client.wait_for_result()
print('[Result] State: %d'%(client.get_state()))
print('[Result] Status: %s'%(client.get_goal_status_text()))
result = client.get_result()
print('[Result] Time elapsed: %f'%(result.time_elapsed.to_sec()))
print('[Result] Update sent: %d'%(result.updates_sent))

fancyactionserver.py:

import rospy

import actionlib

from talker_listern.msg import TimerAction, TimerGoal,TimerFeedback,TimerResult

import time




  def do_timer(goal):

start_time = time.time()
update_count = 0
    if goal.time_to_wait.to_sec() > 60.0:
    result = TimerResult()  # define a object
    result.time_elapsed = rospy.Duration.from_sec(time.time()-start_time)
    result.updates_sent = update_count
    server.set_aborted(result,"Timer aborted due to  too-long wait")
    return
while (time.time()-start_time) < goal.time_to_wait.to_sec():
    if (server.is_preempt_requested()):
    result = TimerResult()
    result.time_elapsed = rospy.Duration.from_sec(time.time()-start_time)
    result.updates_sent = update_count
    server.set_preempted(result,"Timer preempted")
    return
        feedback = TimerFeedback()
        feedback.time_elapsed = rospy.Duration.from_sec(time.time()-start_time)
        feedback.time_remaining = goal.time_to_wait-feedback.time_elapsed
        server.publish_feedback(feedback)
        update_count += 1
        time.sleep(1.0)
    result=TimerResult()
    result.time_elapsed = rospy.Duration.from_sec(time.time()-start_time)
    result.updates_sent = update_count
    server.set_succeeded(result, "Timer completed successfully")
    print '"result.updates_sent:" %d'%(result.updates_sent)

rospy.init_node('timer_action_server')
server = actionlib.SimpleActionServer('timer', TimerAction, do_timer, False)
server.start()
rospy.spin()