I got it.Thank you for your help 在 2019年8月21日星期三 UTC+8下午11:00:26，Ian Lance Taylor写道： > > On Wed, Aug 21, 2019 at 5:55 AM zct <tangzho...@bytedance.com > <javascript:>> wrote: > > > > I recently had a goroutine leak problem, the code i reduced is like > this: https://play.golang.org/p/YW4hWoZZ7CD. > > > > The program is long-running and the finalizer is not called > > > > The RoomObj is deleted from map， why was it not released？ Is it refereed > by the asyncChan object？ > > > > I don't understand here, can somebody explain the reason > > Your finalizer itself is keeping the value alive. > > runtime.SetFinalizer(a, func(r *RoomTest) { > fmt.Println("SetFinalizer") > close(a.asyncChan.a) > }) > > You need to write the finalizer function to refer to r, not a. The > reference to a in the finalizer function ensures that a is always > live. > > Ian >
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