diff --git a/src/scheduler/main.py b/src/scheduler/main.py
index 59d0626a2..202d353ba 100644
--- a/src/scheduler/main.py
+++ b/src/scheduler/main.py
@@ -137,7 +137,7 @@ def generate_external_plugins(plugins: List[Dict[str, Any]], *, original_path: U
         original_path.mkdir(parents=True, exist_ok=True)
         for plugin in plugins:
             try:
-                if not plugin["data"]:
+                if plugin["data"]:
                     tmp_path = original_path.joinpath(plugin["id"], f"{plugin['name']}.tar.gz")
                     tmp_path.parent.mkdir(parents=True, exist_ok=True)
                     tmp_path.write_bytes(plugin["data"])
diff --git a/tests/SwarmTest.py b/tests/SwarmTest.py
index 04ca4b451..2d6880a81 100644
--- a/tests/SwarmTest.py
+++ b/tests/SwarmTest.py
@@ -171,6 +171,21 @@ class SwarmTest(Test):
                 sleep(1)
                 i += 1
             if not healthy:
+                proc = run(
+                    'docker stack services --format "{{ .Name }}" ' + self._name,
+                    cwd="/tmp/swarm",
+                    shell=True,
+                    capture_output=True,
+                )
+                for service in proc.stdout.decode().splitlines():
+                    proc2 = run(
+                        'docker service ps ' + service,
+                        cwd="/tmp/swarm",
+                        shell=True,
+                        capture_output=True,
+                    )
+                    log("SWARM", "❌", f"stdout logs = {proc2.stdout.decode()}")
+                    log("SWARM", "❌", f"stderr logs = {proc2.stderr.decode()}")
                 raise (Exception("swarm stack is not healthy"))
         except:
             log(