Problem: fail to benchmark for one validator only (#1602)

* Problem: fail to benchmark for one validator only

* add comment

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Co-authored-by: HuangYi <[email protected]>

Author: mmsqe

testground/benchmark/benchmark/stateless.py

@@ -396,7 +396,11 @@ def wait_for_peers(home: Path):
     cfg = tomlkit.parse((home / "config" / "config.toml").read_text())
     peers = cfg["p2p"]["persistent_peers"]
     for peer in peers.split(","):
-        host = peer.split("@", 1)[1].split(":", 1)[0]
+        parts = peer.split("@", 1)
+        if len(parts) < 2:
+            # ignore invalid or empty peer
+            continue
+        host = parts[1].split(":", 1)[0]
         print("wait for peer to be ready:", host)
         wait_for_port(ECHO_SERVER_PORT, host=host, timeout=2400)