Merge branch 'main' into fix-kernelspecs-issue

Author: kevin-bates

docs/source/operators/deploy-docker.md

@@ -216,7 +216,7 @@ To see all configurable class-options for some <cmd>, use:
 Examples
 --------
 
-    jupyter-docker-spec install --language=R --kernel-name=r_docker --image_name=foo/my_r_kernel_image:v4_0
+    jupyter-docker-spec install --language=R --kernel-name=r_docker --image-name=foo/my_r_kernel_image:v4_0
 
     jupyter-docker-spec install --swarm --kernel-name=python_swarm
 

gateway_provisioners/cli/docker_specapp.py

@@ -37,7 +37,7 @@ class DockerSpecInstaller(BaseSpecApp):
     # Note that the left justification of the second example is necessary to ensure proper
     # alignment with the first example during --help output.
     examples = """
-    jupyter-docker-spec install --language=R --kernel-name=r_docker --image_name=foo/my_r_kernel_image:v4_0
+    jupyter-docker-spec install --language=R --kernel-name=r_docker --image-name=foo/my_r_kernel_image:v4_0
 
 jupyter-docker-spec install --swarm --kernel-name=python_swarm
     """

gateway_provisioners/yarn.py

@@ -240,8 +240,9 @@ async def cleanup(self, restart: bool = False) -> None:
             self.local_proc.wait()
             self.local_proc = None
 
-        # reset application id to force new query - handles kernel restarts/interrupts
+        # reset application id and assigned host to force new query - handles kernel restarts/interrupts
         self.application_id = None
+        self.assigned_host = ""
 
         # for cleanup, we should call the superclass last
         await super().cleanup(restart=restart)