[wip] ipykernel 7 support

.github/workflows/test.yml

@@ -122,7 +122,7 @@ jobs:
 
       - name: Install Python dependencies
         run: |
-          pip install --pre --upgrade ipyparallel[test]
+          pip install --pre --upgrade ipyparallel[test] 'https://github.com/minrk/ipykernel/archive/parallel.tar.gz#egg=ipykernel'
 
       - name: Install extra Python packages
         if: ${{ ! startsWith(matrix.python, '3.11') }}

ipyparallel/cluster/launcher.py

@@ -563,6 +563,10 @@ async def join(self, timeout=None):
         """Wait for the process to exit"""
         if self._wait_thread is not None:
             self._wait_thread.join(timeout=timeout)
+            if self._wait_thread.is_alive():
+                raise TimeoutError(
+                    f"Process {self.process.pid} did not exit in {timeout} seconds."
+                )
 
     def _stream_file(self, path):
         """Stream one file"""