[BUG] Building Lighting in OS X Editor stays at 0% indefinitely when Lightmass is blocked by firewall

anonymous_user_bcd0d281
Sun, 06 Apr 2014 02:26:41 +0000
Rendering

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.

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