net: Dial in init function hangs for 2 minutes #5216
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I have confirmed this on OS X (just in case it was a epoll/kqueue related issue) odessa(~/src) % time GOMAXPROCS=4 GOGCTRACE=1 ./rog gc1(1): 0+0+0 ms, 0 -> 0 MB 35 -> 37 (38-1) objects, 0(0) handoff, 0(0) steal, 0/0/0 yields dialling scvg0: inuse: 0, idle: 0, sys: 1, released: 0, consumed: 1 (MB) gc2(2): 0+0+0 ms, 0 -> 0 MB 182 -> 142 (188-46) objects, 1(10) handoff, 1(1) steal, 32/7/0 yields err dial tcp 127.0.0.1:14356: connection refused here real 2m0.014s user 0m0.007s sys 0m0.007s The err appears to be returned immediately after gc2 |
If the GC is turned off, the program unwedges itself as soon as the scvg forces a GC odessa(~/src) % time GOGC=off GOMAXPROCS=4 GOGCTRACE=1 ./rog dialling scvg0: GC forced scvg0: inuse: 0, idle: 0, sys: 1err dial tcp 127.0.0.1:14356: connection refused , released: 0, consumed: here 1 (MB) real 1m0.013s user 0m0.007s sys 0m0.006s |
Sent https://golang.org/cl/8459043/ Owner changed to @dvyukov. |
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This issue was closed by revision 0b5d559. Status changed to Fixed. |
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There's a server listening on localhost:14356. The following code sometimes blocks for exactly 3 minutes when GOMAXPROCS>1. (I verified that other code can connect during this time). go version e77430da3316, ubuntu 12.10, amd64 package main import ( "fmt" "net" ) func init() { fmt.Printf("dialling\n") _, err := net.Dial("tcp", "localhost:14356") fmt.Printf("err %v\n", err) } func main() { fmt.Printf("here\n") }The text was updated successfully, but these errors were encountered: