On Wed, Feb 26, 2020 at 7:11 AM Manlio Perillo <manlio.peri...@gmail.com> wrote: > > On Wednesday, February 26, 2020 at 3:51:54 PM UTC+1, Peter Kleiweg wrote: >> >> Op woensdag 26 februari 2020 13:05:40 UTC+1 schreef Manlio Perillo: >>> >>> On Wednesday, February 26, 2020 at 12:33:05 PM UTC+1, Peter Kleiweg wrote: >>>> >>>> With Go version 1.14 I get a lot of errors when I run: >>>> >>>> go test -v github.com/pebbe/zmq4 >>>> >>>> I didn't see this with Go 1.13.8 or any earlier version. >>>> >>>> Is this a problem with Go 1.14, or am I doing something wrong and just got >>>> lucky until now? >>>> >>>> How do I debug this? The errors are different for each run. Below is a >>>> sample of some errors. >>>> Line numbers are not always accurate, because I inserted some calls to >>>> test.Log(). >>> >>> >>> The errors are probably caused by https://golang.org/doc/go1.14#runtime. >>> >>> The solution is to update zmq4 to explicitly handle interrupted system >>> calls. >> >> >> Often the program freezes before I get an interrupted system call. It hangs >> inside a ZeroMQ C++ library function. >> zmq4 is just a wrapper for ZeroMQ. I can't "fix" ZeroMQ to make it work with >> Go. >> >> Is there a way to stop Go from interrupting my system calls? It happens >> rather randomly all over the place. > > > https://stackoverflow.com/questions/36040547/zeromq-how-to-react-on-different-signal-types-on-eintr > > ZeroMQ may return an EINTR error , but zmq4 does not list it in errors.go. > ZeroMQ asks the caller to handle EINTR, so zmq4 should handle it internally > or return it to the caller. > > https://golang.org/doc/go1.14#runtime should have mentioned that not only > programs that use packages like syscall or golang.org/x/sys/unix will see > more slow system calls fail with EINTR errors, but also programs that use Cgo.
I don't know ZeroMQ. If the ZeroMQ calls correspond closely to system calls, then it could work for them to return EINTR. In that case the fix is going to be for the Go wrapper around ZeroMQ to check whether the error returned is syscall.EINTR, and to retry the call if it is. Ian -- 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/CAOyqgcUGT0eeZxknAd-L2FVRavh6XNYchrUw8WeW7CnmySVFnw%40mail.gmail.com.
