fix model DL doe 4-th time

packages/tracker/meshnet_tracker/server.py

@@ -3879,10 +3879,17 @@ class _TrackerHandler(http.server.BaseHTTPRequestHandler):
         self.send_header("Content-Type", "application/x-tar")
         self.send_header("X-Meshnet-Model-Source", "tracker")
         self.end_headers()
-        # dereference: HF cache snapshots are symlinks into blobs/ — ship contents.
-        with tarfile.open(fileobj=self.wfile, mode="w|", dereference=True) as archive:
-            for rel in rel_files:
-                archive.add(snapshot_dir / rel, arcname=rel)
+        try:
+            # dereference: HF cache snapshots are symlinks into blobs/ — ship contents.
+            with tarfile.open(fileobj=self.wfile, mode="w|", dereference=True) as archive:
+                for rel in rel_files:
+                    archive.add(snapshot_dir / rel, arcname=rel)
+        except (BrokenPipeError, ConnectionResetError):
+            print(
+                f"model-file download aborted by client "
+                f"({self.client_address[0]}, model={resolved_name})",
+                flush=True,
+            )
 
     def _handle_network_assign(self, parsed: urllib.parse.ParseResult):
         """Assign a new node to fill the biggest uncovered shard gap across HF-model nodes.