From 2380a4f252f0943e36b0bbad24a0ceca4ecf29b9 Mon Sep 17 00:00:00 2001
From: Iwan BK <iwanbk@gmail.com>
Date: Fri, 8 Apr 2022 08:22:16 +0700
Subject: [PATCH] Mitigate frozen predixy due to infinite TCP conn retry to a
 failed Redis cluster node

---
 src/Socket.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/Socket.cpp b/src/Socket.cpp
index effb7b6..68403e4 100644
--- a/src/Socket.cpp
+++ b/src/Socket.cpp
@@ -178,6 +178,13 @@ bool Socket::setTcpKeepAlive(int interval)
     if (ret != 0) {
         return false;
     }
+    // Mitigate frozen predixy due to infinite TCP conn retry to a failed Redis cluster node
+    // https://github.com/joyieldInc/predixy/issues/136
+    val = 1000; // millisecond
+    ret = setsockopt(mFd, IPPROTO_TCP, TCP_USER_TIMEOUT, &val, sizeof(val));
+    if (ret != 0) {
+        return false;
+    }
 #else
     ((void)interval); //Avoid unused var warning for non Linux systems
 #endif
@@ -238,4 +245,4 @@ int Socket::writev(const struct iovec* vecs, int cnt)
         return n;
     }
     return 0;
-}
+}
\ No newline at end of file