fix goroutine leak
fix goroutine leak

Cepave/open-falcon-backend,minimum-hsu/agent,minimum-hsu/agent,open-falcon/agent,open-falcon/agent,jojohappy/falcon-plus,Cepave/open-falcon-backend,oiooj/agent-1,onlymellb/agent,cloverstd/open-falcon-agent-in-docker,masato25/open-falcon-backend,360sec/agent,oiooj/agent-1,open-falcon/agent,oiooj/agent-1,jojohappy/falcon-plus,coraldane/agent,masato25/open-falcon-backend,jojohappy/falcon-plus,masato25/open-falcon-backend,aprilnops/agent,open-falcon/falcon-plus,taomaree/falcon-plus,Cepave/agent,cloverstd/open-falcon-agent-in-docker,donh/agent,coraldane/agent,aprilnops/agent,open-falcon/falcon-plus,open-falcon/falcon-plus,Cepave/open-falcon-backend,onlymellb/agent,cloverstd/open-falcon-agent-in-docker,aprilnops/agent,Cepave/agent,jojohappy/falcon-plus,Cepave/agent,taomaree/falcon-plus,taomaree/falcon-plus,masato25/open-falcon-backend,open-falcon/falcon-plus,Cepave/agent,open-falcon/falcon-plus,jojohappy/falcon-plus,taomaree/falcon-plus,taomaree/falcon-plus,open-falcon-archive/agent,jojohappy/falcon-plus,360sec/agent,Cepave/open-falcon-backend,Cepave/open-falcon-backend,coraldane/agent,Cepave/open-falcon-backend,donh/agent,taomaree/falcon-plus,open-falcon-archive/agent,donh/agent,360sec/agent,open-falcon/agent,open-falcon-archive/agent,oiooj/agent-1,cloverstd/open-falcon-agent-in-docker,open-falcon-archive/agent,minimum-hsu/agent,360sec/agent,onlymellb/agent,aprilnops/agent,minimum-hsu/agent,donh/agent,masato25/open-falcon-backend,masato25/open-falcon-backend,onlymellb/agent,coraldane/agent