From 19da39cf27d53f3a85935ece4ad9df0b73a4d49a Mon Sep 17 00:00:00 2001
From: pasta <pasta@dashboost.org>
Date: Wed, 11 Nov 2026 02:05:50 +0000
Subject: [PATCH] fix(net): wait for socket writability after failed sends

Clear the cached send readiness when a nonblocking send fails so the socket handler waits for a writable event instead of polling continuously. Keep readiness when the transport has no bytes to send.

Co-Authored-By: GPT 6.1 Sol <noreply@openai.com>
---
 src/net.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/net.cpp b/src/net.cpp
index d072c33aa305..68e7ac366c43 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -1774,6 +1774,7 @@ std::pair<size_t, bool> CConnman::SocketSendData(CNode& node) const
                     LogPrint(BCLog::NET, "socket send error for peer=%d: %s\n", node.GetId(), NetworkErrorString(nErr));
                     node.fDisconnect = true;
                 }
+                node.fCanSendData = false;
             }
             break;
         }