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handle XPUB socket type in kernel protocol #985

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Merged
minrk merged 1 commit into from
Feb 12, 2026
Merged

handle XPUB socket type in kernel protocol #985

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19 changes: 11 additions & 8 deletions ipyparallel/engine/app.py
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@
# Copyright (c) IPython Development Team.
# Distributed under the terms of the Modified BSD License.
import asyncio
import inspect
import json
import os
import signal
Expand All @@ -17,6 +18,7 @@

import ipykernel
import zmq
from ipykernel.iostream import IOPubThread
from ipykernel.kernelapp import IPKernelApp
from ipykernel.zmqshell import ZMQInteractiveShell
from IPython.core.profiledir import ProfileDir
Expand Down Expand Up @@ -667,17 +669,18 @@ def urls(key):

# create iopub stream:
iopub_addr = url('iopub')
iopub_socket = self.iopub_socket = ctx.socket(zmq.PUB)
thread_params = {}
if 'session' in inspect.signature(IOPubThread).parameters:
iopub_socket_type = zmq.XPUB
thread_params["session"] = self.session
else:
iopub_socket_type = zmq.PUB
iopub_socket = self.iopub_socket = ctx.socket(iopub_socket_type)
iopub_socket.SNDHWM = 0
iopub_socket.setsockopt(zmq.IDENTITY, identity)
connect(iopub_socket, iopub_addr)
try:
from ipykernel.iostream import IOPubThread
except ImportError:
pass
else:
iopub_socket = IOPubThread(iopub_socket)
iopub_socket.start()
iopub_socket = IOPubThread(iopub_socket, **thread_params)
iopub_socket.start()

# disable history:
self.config.HistoryManager.hist_file = ':memory:'
Expand Down