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Ros2 beta2 on mac crashes with "Address already in use"

I built ros2 beta2 from sources on a mac and when trying examples, the execution fails:

ros2 run demo_nodes_cpp talker
libc++abi.dylib: terminating with uncaught exception of type std::__1::system_error: set_option: Address already in use

Anyone experienced this? Any idea how to fix this?

Hi we had the same case on linux in case a network interface had an alias set. We simply removed the alias an the fast rtps middle worked.

I’m not aware of any aliases set, however the mac has bunch of network interfaces defined, but only one (wifi) is active.

For me, on OS X, it was caused by being connected to a VPN. This error should only occur with fastrtps as the RMW implementation. It’s being tracked upstream at