Fix potential deadlock in conn pool(issune #15)
Fix potential deadlock in conn pool(issune #15)

mediocregopher/radix.v3,gabrielperezs/radix.improved,rightscale/radix,fzzy/radix,ctrlaltdel121/radix,mediocregopher/radix.v2,trigrass2/radix,beni55/radix,bpowers/radix,alphagov/radix,bpowers/radix