reduce log spewing in nanny

distributed/nanny.py

@@ -678,13 +678,11 @@ async def start(self) -> Status:
             logger.exception("Nanny failed to start process", exc_info=True)
             await self.process.terminate()
             self.status = Status.failed
-            return self.status
         try:
             msg = await self._wait_until_connected(uid)
         except Exception:
-            logger.exception("Failed to connect to process")
-            self.status = Status.failed
             await self.process.terminate()
+            self.status = Status.failed
             raise
         if not msg:
             return self.status
@@ -809,9 +807,6 @@ async def _wait_until_connected(self, uid):
                 continue
 
             if "exception" in msg:
-                logger.error(
-                    "Failed while trying to start worker process: %s", msg["exception"]
-                )
                 raise msg["exception"]
             else:
                 return msg

distributed/tests/test_nanny.py

@@ -496,6 +496,8 @@ async def test_worker_start_exception(s):
     # ^ NOTE: `Nanny.close` sets it to `closed`, then `Server.start._close_on_failure` sets it to `failed`
     assert nanny.process is None
     assert "Restarting worker" not in logs.getvalue()
+    # Avoid excessive spewing. (It's also printed once extra within the subprocess, which is okay.)
+    assert logs.getvalue().count("test_nanny.StartException: broken") == 1
 
 
 @gen_cluster(nthreads=[])