From 2244d0d2e2757cb92421fd270ee93328bf782838 Mon Sep 17 00:00:00 2001
From: Lanzheng Liu <lanzheng.liulz@alibaba-inc.com>
Date: Fri, 31 May 2024 01:45:59 +0800
Subject: [PATCH] fix dns resolver discard_cache (#497)

Signed-off-by: liulanzheng <lanzheng.liulz@alibaba-inc.com>
---
 net/utils.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/net/utils.cpp b/net/utils.cpp
index ed514ed9..010678f3 100644
--- a/net/utils.cpp
+++ b/net/utils.cpp
@@ -304,8 +304,10 @@ class DefaultResolver : public Resolver {
 
     void discard_cache(const char *host, IPAddr ip) override {
         auto ipaddr = dnscache_.borrow(host);
-        if (ip.undefined() || ipaddr->empty()) ipaddr.recycle(true);
-        else {
+        if (ip.undefined() || ipaddr->empty()) {
+            ipaddr->delete_all();
+            ipaddr.recycle(true);
+        } else {
             for (auto itr = ipaddr->rbegin(); itr != ipaddr->rend(); itr++) {
                 if ((*itr)->addr == ip) {
                     ipaddr->erase(*itr);