diff --git a/lib/galaxy/job_execution/container_monitor.py b/lib/galaxy/job_execution/container_monitor.py
index 0590ce715db94a7323a87e4d3f7d90843612b9c1..307b254705048fcdec021d5040f71a51dcda34f2 100644
--- a/lib/galaxy/job_execution/container_monitor.py
+++ b/lib/galaxy/job_execution/container_monitor.py
@@ -30,7 +30,8 @@ def parse_ports(container_name, connection_configuration):
                 stdout_file.seek(0)
                 ports_raw = stdout_file.read().decode("utf-8")
                 return ports_raw
-
+            else:
+                raise Exception("Could not find port.")
 
 def get_ip_command(cmd) -> str:
     return subprocess.check_output(shlex.split(cmd), text=True).strip()