Simulation incompatabiltiy with pyzmq v23.0.0

[julianhoersch]

From pyzmq version 23.0.0 there seems to be an incompatibility with the current implementation of the simulation server and pyzmq. It still works with the previous version 22.3.0. Upon calling the next() method on a karabo-bride client, a zmq error occurs.

Steps to reproduce this behaviour on Maxwell:

• create a virtual environment and install karabo-bridge (this installs pyzmq v23.0.0 by default)

• python3 -m venv test_pyzmq_env

• source test_pyzmq_env/bin/activate

• Start the simulated data generation in a python terminal: >>> from karabo_bridge import start_gen >>> start_gen(1234) Simulated Karabo-bridge server started on: tcp://max-exfl-display001.desy.de:1234

• Connect the client: >>> from karabo_bridge import Client >>> krb_client = Client('tcp://max-exfl-display001.desy.de:1234') >>> krb_client.next()

now an error is reported:

Traceback (most recent call last): File "\", line 1, in File "/gpfs/exfel/data/scratch/jhoersch/test_pyzmq_env/lib/python3.7/site-packages/karabo_bridge/server.py", line 252, in start_gen sender.loop() File "/gpfs/exfel/data/scratch/jhoersch/test_pyzmq_env/lib/python3.7/site-packages/karabo_bridge/server.py", line 91, in loop done = self.send(data, meta) File "/gpfs/exfel/data/scratch/jhoersch/test_pyzmq_env/lib/python3.7/site-packages/karabo_bridge/server.py", line 64, in send self.server_socket.send_multipart(payload, copy=False) File "/gpfs/exfel/data/scratch/jhoersch/test_pyzmq_env/lib/python3.7/site-packages/zmq/sugar/socket.py", line 670, in send_multipart self.send(msg, zmq.SNDMORE | flags, copy=copy, track=track) File "/gpfs/exfel/data/scratch/jhoersch/test_pyzmq_env/lib/python3.7/site-packages/zmq/sugar/socket.py", line 615, in send return super().send(data, flags=flags, copy=copy, track=track) File "zmq/backend/cython/socket.pyx", line 740, in zmq.backend.cython.socket.Socket.send File "zmq/backend/cython/socket.pyx", line 798, in zmq.backend.cython.socket.Socket.send File "zmq/backend/cython/socket.pyx", line 249, in zmq.backend.cython.socket._send_copy File "zmq/backend/cython/socket.pyx", line 244, in zmq.backend.cython.socket._send_copy File "zmq/backend/cython/checkrc.pxd", line 28, in zmq.backend.cython.checkrc._check_rc zmq.error.ZMQError: Operation cannot be accomplished in current state

[tmichela]

In the lastest pyzmq release constants have been changed to Python enums. I have a fix at #65 Can you check if that solves your issues?

[julianhoersch]

Thanks a lot, yes it fixes the issues! I close this issue now.

[tmichela]

Thanks! I released 0.6.2 with the fix.