"runtime: failed to create new OS thread" with docker-machine, compiled golang apps, etc.

[asw]

If I grab docker-engine from https:/docker/machine/releases/ and try to run it I receive an error like this:

runtime: failed to create new OS thread (have 2 already; errno=22)
fatal error: newosproc
...

I also have the same issue with Go applications I've cross-compiled on Windows.

[stehufntdev]

Thanks for reporting the issue. Can you please share out an strace of the failing binaries? Based on the error there is likely an unsupported clone flag, but it could be something else.

[asw]

Not a problem! Here is a gist of the strace of the latest docker-machine binary from (https:/docker/machine/releases/): https://gist.github.com/asw/67d7f30c808cacce14e450e59b24598e

[stehufntdev]

Thanks, appreciate the help! Looks like an unsupported clone flag combination:

391 clone(child_stack=0x7ff5dff15fc0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD) = -1 EINVAL (Invalid argument)
392 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
393 write(2, "runtime: failed to create new OS"..., 46runtime: failed to create new OS thread (have ) = 46

Thanks for catching and reporting it, I'll open a bug on our end.

[stehufntdev]

After improving the clone flag support, docker-machine makes a little more progress but reports other failures shortly after.

Please give us feedback on the docker-machine request on the uservoice page so we can prioritize. Thanks for trying out WSL!

[asw]

Thank you for the response. Does this help Go programs. Can we go run/go build or run a cross-compiled hello world (https://tour.golang.org/welcome/1) perhaps? How long would it be before we receive these updates?

[stehufntdev]

With the clone flag support, I was able to run a cross-compiled "hello world" go binary. Compiling the binary is hitting unimplemented surface area, the fallocate syscall seems to be the main blocker there.

The clone flags updates should be out soon for insiders, unclear exactly when since it depends on the release schedule. Please also give the go feedback on the the uservoice page so we can prioritize.

[russalex]

Running cross-compiled "hello world" go binaries is working on build 14352. This does unblock running "docker" to connect to the docker engine running on another machine.

The docker-engine itself is being tracked in #85.

[benhillis]

Closing as a duplicate.