Fix TL log spam. (#19032)

* Debug TL log spam.

* Update chia/timelord/timelord.py

Co-authored-by: Kyle Altendorf <sda@fstab.net>

* Add log.exception.

---------

Co-authored-by: Kyle Altendorf <sda@fstab.net>

chia/timelord/timelord.py

@@ -218,18 +218,17 @@ async def _handle_client(self, reader: asyncio.StreamReader, writer: asyncio.Str
 
     async def _stop_chain(self, chain: Chain) -> None:
         try:
-            _, _, stop_writer = self.chain_type_to_stream[chain]
+            _, _, stop_writer = self.chain_type_to_stream.pop(chain)
+            if chain not in self.unspawned_chains:
+                self.unspawned_chains.append(chain)
             if chain in self.allows_iters:
+                self.allows_iters.remove(chain)
                 stop_writer.write(b"010")
                 await stop_writer.drain()
-                self.allows_iters.remove(chain)
             else:
                 log.error(f"Trying to stop {chain} before its initialization.")
                 stop_writer.close()
                 await stop_writer.wait_closed()
-            if chain not in self.unspawned_chains:
-                self.unspawned_chains.append(chain)
-            del self.chain_type_to_stream[chain]
         except ConnectionResetError as e:
             log.error(f"{e}")
         except Exception as e:
@@ -1094,6 +1093,8 @@ async def _do_process_communication(
 
         except ConnectionResetError as e:
             log.debug(f"Connection reset with VDF client {e}")
+        except Exception:
+            log.exception("VDF client communication terminated abruptly")
 
     async def _manage_discriminant_queue_sanitizer(self) -> None:
         while not self._shut_down: