From b08ebcd02e11ea59f158ac34d4b9f4f226d6f326 Mon Sep 17 00:00:00 2001
From: holmes1412 <liyingxin1412@gmail.com>
Date: Tue, 5 Mar 2024 22:49:58 +0800
Subject: [PATCH] Avoid WFSGResolverTask::dispatch() select more than once.

---
 src/nameservice/WFServiceGovernance.cc | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/nameservice/WFServiceGovernance.cc b/src/nameservice/WFServiceGovernance.cc
index 4fb1e897..dda3a6be 100644
--- a/src/nameservice/WFServiceGovernance.cc
+++ b/src/nameservice/WFServiceGovernance.cc
@@ -116,6 +116,12 @@ void WFSGResolverTask::dispatch()
 	WFNSTracing *tracing = ns_params_.tracing;
 	EndpointAddress *addr;
 
+	if (!sg_)
+	{
+		this->WFResolverTask::dispatch();
+		return;
+	}
+
 	if (sg_->pre_select_)
 	{
 		WFConditional *cond = sg_->pre_select_(this);
@@ -145,6 +151,7 @@ void WFSGResolverTask::dispatch()
 		}
 
 		tracing_data->history.push_back(addr);
+		sg_ = NULL;
 
 		copy_host_port(ns_params_.uri, addr);
 		dns_ttl_default_ = addr->params->dns_ttl_default;