When running multiplayer server, this sometimes occurs:
[14:35:20] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 3989ms behind, skipping 79 tick(s)
[14:35:58] [Server thread/WARN]: Tried to add entity with duplicate UUID 3a3d3602-6551-4c05-a4b3-08a997210999
[14:35:58] [Server thread/WARN]: Tried to add entity with duplicate UUID 5d690dc4-b15b-49ed-9b3f-aeaf6ad2dd4d
[14:36:01] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 3468ms behind, skipping 69 tick(s)
and it causes random lag spikes, I'm running the .jar file with 8GB RAM, so it's not a RAM issue, I've had this since 15w31a, with multiple players in a server it's very annoying and sometimes getting kicked from the server.
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[14:49:20] [Server thread/INFO]: Starting minecraft server version 15w31c
[14:49:20] [Server thread/INFO]: Loading properties
[14:49:21] [Server thread/INFO]: Default game type: SURVIVAL
[14:49:21] [Server thread/INFO]: Generating keypair
[14:49:22] [Server thread/INFO]: Starting Minecraft server on *:25567
[14:49:22] [Server thread/INFO]: Using epoll channel type
[14:49:24] [Server thread/INFO]: Preparing level "Snapshot_15w31a"
[14:49:24] [Server thread/INFO]: Preparing start region for level 0
[14:49:25] [Server thread/INFO]: Preparing spawn area: 64%
[14:49:25] [Server thread/INFO]: Done (1.791s)! For help, type "help" or "?"
[14:50:11] [Server thread/WARN]: Tried to add entity with duplicate UUID 3a3d3602-6551-4c05-a4b3-08a997210999
[14:50:11] [Server thread/WARN]: Tried to add entity with duplicate UUID 5d690dc4-b15b-49ed-9b3f-aeaf6ad2dd4d
[14:51:02] [User Authenticator #1/INFO]: UUID of player purefmwc is 763f96ac-e37e-41f5-867a-3b0720e37a15
[14:51:02] [Server thread/INFO]: purefmwc[/[MY_IP]:54344] logged in with entity id 245 at (-1892.5734651137886, 62.0, 856.0128593187751)
[14:51:02] [Server thread/INFO]: purefmwc joined the game
[14:51:02] [Server thread/WARN]: Tried to add entity with duplicate UUID f16a1316-c20c-4958-9de3-7659ebc610f7
[14:51:25] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2076ms behind, skipping 41 tick(s)
[14:53:05] [Server Watchdog/FATAL]: A single server tick took 60.00 seconds (should be max 0.05)
[14:53:05] [Server Watchdog/FATAL]: Considering it to be crashed, server will forcibly shutdown.
[14:53:07] [Server Watchdog/ERROR]: This crash report has been saved to: ./crash-reports/crash-2015-08-01_14.53.07-server.txt
[14:53:08] [Server Shutdown Thread/INFO]: Stopping server
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This is not for lag reporting. This is for bug reporting, but this is really odd. If this reoccurs on a 15w31C server again, something's up.
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It's not a lag report, it's a crash report >_> it clearly crashed, the lag spikes are just caused by this "duplicate UUID" stuff
kumasasa
Watchdog shuts down server because of lag.
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And what's causing the lag? The "Tried to add duplicate UUID" stuff >_<
kumasasa
Yup. That's MC-82945
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Ah, I didn't see that, but it the description is wrong tho, I had it already without building a nether portal, and doesn't have to push anything into it either.
kumasasa
Added that to the description there.
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It is currently affecting my 0.13.0 MCPE. Adding servers through external does not actually add to the server list as explained in bug description.
The only things I have done to the game files are add maps and nothing more