clear timer in quit() + only call callback when all done
clear timer in quit() + only call callback when all done

i/tchannel,hustxiaoc/tchannel,i/tchannel,Zirpon/tchannel,hustxiaoc/tchannel,RyanTech/tchannel,savaki/tchannel,RyanTech/tchannel,Zirpon/tchannel,vanloswang/tchannel,bunnyblue/tchannel,savaki/tchannel,bunnyblue/tchannel,benfleis/tchannel,i/tchannel,vanloswang/tchannel,savaki/tchannel,Zirpon/tchannel,davewhat/tchannel,chenwenbin928/tchannel,chenwenbin928/tchannel,bunnyblue/tchannel,sasa233/tchannel,chenwenbin928/tchannel,sasa233/tchannel,sasa233/tchannel,benfleis/tchannel,vanloswang/tchannel,benfleis/tchannel,hustxiaoc/tchannel,davewhat/tchannel,RyanTech/tchannel