Avoid init log-related vars every time to prevent multithread problem
Avoid init log-related vars every time to prevent multithread problem

caijieming-baidu/ins,huayl/ins,baidu/ins,huayl/ins,baidu/ins,baidu/ins,huayl/ins,caijieming-baidu/ins,Kai-Zhang/ins,Kai-Zhang/ins,caijieming-baidu/ins,Kai-Zhang/ins