Which Issue(s) This PR Fixes

Fixes #issue_id

Brief Description

在一些异常场景，可以模拟对ha端口的探活测试，由于conn.start会马上启动线程，在足够快失败的场景，会先执行removeConnection动作，而后再执行addConnection动作，最终造成connection泄漏，滞留 HaService 的connectionList里面，累积造成内存溢出风险。

How Did You Test This Change?

使用python脚本进行ha端口10912的高频探活验证是否还存在内存泄漏

-- coding:UTF-8 --

import sys
import socket
import time
sys.path.append(".")
def tcp_health_check(host, port):
now = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
try:
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout(1)
sock.connect((host, port))
sock.sendall(now.encode())
print("{}TCP连接成功:{}:{}".format(now,host,port))
sock.close()
return True
except socket.error as e:
print("TCP连接失败: {}".format(e))
if sock:
sock.close()
return False

def main():
host = '127.0.0.1'
port = 8081

while True:
    result = tcp_health_check('127.0.0.1' , 10912)
    time.sleep(0.5)

if name == "main":
main()