Thanks Ian. Aravindhan K
On Thu, Apr 9, 2020 at 3:21 AM Ian Lance Taylor <i...@golang.org> wrote: > On Wed, Apr 8, 2020 at 10:19 AM Aravindhan K <aravindhank1...@gmail.com> > wrote: > > > > If that is the case, in below code main go routine will a reach a > situation where no other go routines running to wake it up. > > But no deadlock is not detected. > > https://play.golang.org/p/z1NMYQAi0KY > > May I assume deadlock - detection couldn't pick up this scenario? > > By using empty select{}, doesn't the coder purposely wishes to block > forever? > > In general the deadlock detector fails in programs that use the > network, because those programs generally have background goroutines, > created by the runtime package, that wait for network activity. So > the deadlock detector thinks that the program is not deadlocked, but > just sleeping waiting for something to happen on the network. > > Yes, select{} implies that that particular goroutines will block > forever, but that doesn't mean that all other goroutines will block. > > Ian > > > > > > On Wed, Apr 8, 2020 at 10:13 PM 'Vikram Ingawale' via golang-nuts < > golang-nuts@googlegroups.com> wrote: > >> > >> Hi Manlio , > >> > >> The select statement will block until one of its cases is executed and > in your program the select statement doesn't have any cas. so it will block > forever and resulting in deadlock > >> > >> > >> Thanks, > >> Vikram Ingawale > >> ph : +91 9766984458 > >> > >> > >> On Wed, Apr 8, 2020 at 9:57 PM Manlio Perillo <manlio.peri...@gmail.com> > wrote: > >>> > >>> On Wednesday, April 8, 2020 at 6:17:59 PM UTC+2, aravind...@gmail.com > wrote: > >>>> > >>>> > >>>> Hi All, > >>>> > >>>> I am not able to understand why this piece of go code deadlocks. > >>>> Doesn't empty select{} blocks forever, irrespective of other go > routines to wake that up. > >>>> > >>>> https://play.golang.org/p/zBWZPjTGYX7 > >>>> > >>> > >>> The error message is very clear: > >>> "fatal error: all goroutines are asleep - deadlock!" > >>> > >>> The problem is that **all** the goroutines are waiting forever. > >>> > >>> Manlio > >>> > >>> -- > >>> You received this message because you are subscribed to the Google > Groups "golang-nuts" group. > >>> To unsubscribe from this group and stop receiving emails from it, send > an email to golang-nuts+unsubscr...@googlegroups.com. > >>> To view this discussion on the web visit > https://groups.google.com/d/msgid/golang-nuts/2f29cf8f-0e08-4e83-9a05-d6eb7aa4030d%40googlegroups.com > . > >> > >> -- > >> You received this message because you are subscribed to the Google > Groups "golang-nuts" group. > >> To unsubscribe from this group and stop receiving emails from it, send > an email to golang-nuts+unsubscr...@googlegroups.com. > >> To view this discussion on the web visit > https://groups.google.com/d/msgid/golang-nuts/CADuKi9r73RbYWhw5PSrTY0JVCEx5EYV0MrnSNg%2B_Eppy-p2%3DHw%40mail.gmail.com > . > > > > -- > > You received this message because you are subscribed to the Google > Groups "golang-nuts" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to golang-nuts+unsubscr...@googlegroups.com. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/golang-nuts/CAJn1S2Ob8R1hW2ix3cp2Sd9FOgzM0jcdEsr97suXshEAHSdtoQ%40mail.gmail.com > . > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CAJn1S2Mx%2BRNE_THvDa_C8j%2BLfEmuQfZ9WN_4etVEf9h8Df5aRA%40mail.gmail.com.
