[BUG] Building Lighting in OS X Editor stays at 0% indefinitely when Lightmass is blocked by firewall
I'm using the OS X version of the UE4 editor, running on OS X Mavericks 10.9.2.
Earlier today I had removed several applications from my computer's Firewall Options... menu, which is where you mark an application as being Allowed or Disallowed incoming network connections; I must have gotten too enthusiastic and removed UnrealLightmass.
Later, I was working in a level in the Editor, and Lighting would not build; when trying to build Lighting in a scene the Lighting Build would stay at 0% and not proceed any further. On a scene that took less than a minute to build lighting yesterday, today I left it for 20 minutes and it stayed at 0%. After restarting my computer and trying again, I got a system dialog/pop-up window asking if I wanted to Allow incoming network connections for UnrealLightmass. I clicked Allow, and the Lighting Build worked immediately.
After some quick tests, I discovered that if the built-in Firewall in OS X is turned on, and 1) UnrealLightmass not on the list of applications allowed to have incoming network connections; or 2) UnrealLightmass is disallowed incoming network connections; or 3) there is a system dialog box/pop-up asking if you want to Allow to Disallow incoming network connections and you haven't chosen Allow; then Lighting Build will sit at 0% and not proceed further.
Now that I have the Firewall set to Allow incoming network connections for UnrealLightmass, Lighting Builds work perfectly fine.
I'm not sure if this is really a bug, or a side-effect of some OS X quirk, but I wanted to report it anyways.
No anti-virus software installed, but I do have Freedome VPN. I did try all configurations with the VPN off, though, and still lags at 0%.
And yes, I had to uninstall and reinstall due to another issue, which didn't resolve either (I'll post a separate thread regarding that one later today).
If you need to know hardware here's a screenshot, but I doubt that this setup couldn't handle such a task as building some lighting.
UPDATE: I finally managed to get the lighting to build, and it seems like the issue was with Freedome VPN, after all. After restarting the computer, I turned off Freedome and launched UE4 Editor, after which the build ran with no issues. Still verified that this was the issue by turning on Freedome, and alas the build stayed at 0%, and turning it off again made the build work again. Not sure why this didn't work the first time around, but at least now it works fine (as long as the VPN is off).
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