python socket recv hanging

[tkn-tub]

python socket recv hanging

[anita-hu]

The issue was resolved by setting debug=True in ns3env.Ns3Env(). Would be great if this could be fixed

[chwang1996]

The issue was resolved by setting debug=True in ns3env.Ns3Env(). Would be great if this could be fixed

I have the same problem when running training on my custom environment, thanks for your solution. Hope this issue would be resolved.

[confifu]

Setting debug = True does not solve the problem entirely, it shows the error in ns3 simulation script but stays there forever. To handle runtime errors in the simulation script I added
self.socket.RCVTIMEO = 100000
right next to this line

ns3-gym/src/opengym/model/ns3gym/ns3gym/ns3env.py

Line 40 in 19bfe0a

self.socket = context.socket(zmq.REP)

This makes sure that the socket request does not last forever and times out after 100000 millliseconds. The socket request is here

ns3-gym/src/opengym/model/ns3gym/ns3gym/ns3env.py

Line 180 in 19bfe0a

request = self.socket.recv()

[tim00631]

@confifu
I have the same issue in Ubuntu 18.04.
However, when I use the root user to run my script, the problem doesn't happened.
Maybe you could use the root user to exec the simulation script again.