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Swarm Crashes - Can't restore old settings.

I tried setting up distributed lighting builds for my system, and now I can't build anything (even If I disable distribution). Here are my settings (both PC's have identical settings and are connected via LAN).

alt text

Unfortunately, whenever I try to build lighting from the editor - the editor dialog box pops up for about half a second then dissappears, and swarm doesn't even start building lighting. I checked the log, and this is being printed everytime I run it:

 [2017.09.07-09.54.03:925][342]LightingResults: New page: Lighting Build - 7 Sep 2017 11:54:03
 [2017.09.07-09.54.03:932][342]LogSwarmInterface: [OpenConnection] Registering TCP channel ...
 [2017.09.07-09.54.03:933][342]LogSwarmInterface: [OpenConnection] Connecting to agent ...
 [2017.09.07-09.54.03:934][342]LogSwarmInterface: [TryOpenConnection] Testing the Agent
 [2017.09.07-09.54.03:935][342]LogSwarmInterface: [TryOpenConnection] Opening Connection to Agent
 [2017.09.07-09.54.03:935][342]LogSwarmInterface: [TryOpenConnection] Local Process ID is 6896
 [2017.09.07-09.54.03:982][342]LogStaticLightingSystem: Running Lightmass w/ ImmediateImport mode ENABLED
 [2017.09.07-09.54.03:982][342]LogStaticLightingSystem: Running Lightmass w/ ImmediateProcess mode ENABLED
 [2017.09.07-09.54.03:982][342]LogStaticLightingSystem: Running Lightmass w/ Sorting mode ENABLED
 [2017.09.07-09.54.03:982][342]LogStaticLightingSystem: Running Lightmass w/ Mapping paddings ENABLED
 [2017.09.07-09.54.03:983][342]LogStaticLightingSystem: Running Lightmass w/ Mapping debug paddings DISABLED
 Exception thrown at 0x00007FFB6C439E08 (KernelBase.dll) in UE4Editor.exe: 0xE0434352 (parameters: 0xFFFFFFFF80004003, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x00007FFB43FB0000).
 The thread 0xc60 has exited with code 0 (0x0).
 [2017.09.07-09.54.04:045][342]LogEditorBuildUtils: Build time 0:00

So clearly, something related to Swarm is crashing - but I have no indication what it is. I've followed all the setup guidelines for distributed builds, so why isn't it working?

Worst of all - I've reverted the settings, and now the Engine can't start Lightmass at all. What's the deal? I'm stuck an unable to build lighting on either machine now.

I'm using a source-built version of the engine (4.17.1) - so I can't use 'Verify' on the Launcher.

Product Version: UE 4.17
settings.jpg (156.8 kB)
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asked Sep 07 '17 at 09:59 AM in Bug Reports

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avatar image TheJamsh Sep 07 '17 at 10:03 AM

Just looked at the Swarm Log, this is what I get

 11:02:51: [Interface:TryOpenConnection] Local connection established
 11:02:51: [Interface:OpenJob] Error: Value cannot be null.
 Parameter name: value
 11:02:51: [MaintainConnections] Detected dropped local connection, cleaning up (643BF1C2)
 11:02:51: [CloseConnection] Closing connection 643BF1C2 using handle 643BF1C2
 11:02:51: [CloseConnection] Connection confirmed for disconnection 643BF1C2
 11:02:51: [CloseConnection] Closing orphaned Job ()
 11:02:51: [CloseConnection] Connection disconnected 643BF1C2
 11:02:51: [GetMessage] Safely returning to 643BF1C2 with no message
 11:02:52: [MaintainConnections] Local connection has closed (643BF1C2)
 11:02:52: [MaintainConnections] Removed connection 643BF1C2
 11:02:52: [MaintainConnections] All connections have closed
avatar image TheJamsh Sep 07 '17 at 10:06 AM

Tried disabling Windows Firewall on both machines. STILL fails.

avatar image TheJamsh Sep 07 '17 at 10:16 AM

I removed the Options.XML files so Swarm is back to default settings - now I get the same error, so I'm stuck an unable to build lighting at all.

REALLY need a fix for this!

avatar image TheJamsh Nov 04 '17 at 12:26 PM


Still having this issue. Even reinstalled the engine.

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I never managed to fix this - but I was able to get distributed builds working by following this guide. It seems to be the most up-to-date (even better than the documentation) http://www.srombauts.fr/2017/11/10/ue4-use-swarm-distribute-lighting-build-network/

Since then I've upgraded engine versions, so sorry if anyone has the same issue in the future!

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answered Nov 24 '17 at 09:02 AM

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