This is the meaning here, although in Go you have to read it as "two different goroutines depend.". > In general computing, a deadlock is a situation where two different programs or processes depend on one another for completion, either because both are using the same resources or because of erroneous cues or other problems. It is of course possible to cause deadlocks that the runtime won'tĬatch a variant of the above example that used os.Pipe() instead ofĪ channel would just hang, even though the same concurrency patternsĪre at fault, because the goroutine scheduler doesn't know about pipes, Sleep completes, that goroutine can be scheduled and we're good. That there is a goroutine waiting on sleep() - which might finishĮventually, so it gives it some time, rather than aborting. Time, when the scheduler notices it has nothing to run, it also sees There is another goroutine, which is blocked on a call to sleep. Original goroutine is again blocked on the channel send, but this time In the modified version above, shortly after the program begins, the Only goroutine is waiting on a channel, it knows it will never finish In the first iteration of the program (in your original message), thereĪre no other goroutines at all, so when the scheduler sees that it's Reports an error, rather than just hanging. If so, it waits until there's something to run. Waiting on something that might unblock without the help of another Goroutines that are ready to run, it checks to see if any of them are Happening is when the goroutine scheduler notices it doesn't have any I mentioned this in another comment, but basically what's Normally, the result of a deadlock is that things just hang, but becauseĬhannels are built-in to the language, and the compiler and runtime knowĪbout them, it's possible for the runtime to spot certain patterns ofĭeadlocks. At this point the send succeeds, the first goroutine is unblocked, Goroutine will pull a value out of the channel, making space for one (15) an attempt to break the deadlock (16) On April 16, negotiators called in mediators to help break the deadlock, and the next day Taha returned to Khartoum to consult with President Omar el-Bashir.Then you won't get that error - after the 10 second sleep, the spawned (14) As a result, they are looking to end the current deadlock by resorting to extra-parliamentary means. (13) Police were interviewed on radio warning residents not to deadlock doors overnight without leaving a key in the inside lock. (12) With Bridge-Wilkinson covering his back, the youngster's positive approach looked the best bet to end the tedious deadlock. (11) A long-running deadlock over who should clear up an unauthorised tip in Derbyshire has finally been broken. (10) Bilateral relations have come to a virtual deadlock since the last ministerial talks ended in failure in November last year. (9) The meeting reached a deadlock when Williams challenged Halley to have him removed by municipal security guards. (8) Three minutes into the extra period Avenue finally broke the deadlock. (7) The deadlock was finally broken on the stroke of half-time with a Dean Howell back pass putting Gawthorpe under real pressure. (6) The Government will make a final push this weekend to break the deadlock in the social partnership talks with all the main players warning it is now make-or-break time. (5) After several minutes of explanations, she realized that the groups had reached a deadlock. (3) you can deadlock any exit door from the outside (4) The agreement gives the UN special envoy the formal power to break any political deadlock. (2) Eventually, man of the match Declan Burke broke the deadlock. (1) From what we have seen so far in Congress, the deadlock is being repeated there.
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