Bukkit

What steps will reproduce the problem?
1. Normal start

What is the expected output? What do you see instead?
No warnings

[16:37:09] [Craft Scheduler Thread - 0/INFO]: [MarioKart] Attempting to resolve resource pack URL... (This may take a while)
[16:37:09] [Craft Scheduler Thread - 0/WARN]: java.io.FileNotFoundException: http://minecraft.curseforge.com/texture-packs/74301-mario-kart-resource-pack/files/latest?cookieTest=1
[16:37:09] [Craft Scheduler Thread - 0/WARN]:     at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
[16:37:09] [Craft Scheduler Thread - 0/WARN]:     at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
[16:37:09] [Craft Scheduler Thread - 0/WARN]:     at net.stormdev.RPManager.RPManager.getURLFromCurseForgePage(RPManager.java:51)
[16:37:09] [Craft Scheduler Thread - 0/WARN]:     at net.stormdev.RPManager.RPManager.getRPUrl(RPManager.java:25)
[16:37:09] [Craft Scheduler Thread - 0/WARN]:     at net.stormdev.mario.mariokart.MarioKart$1.run(MarioKart.java:267)
[16:37:09] [Craft Scheduler Thread - 0/WARN]:     at org.bukkit.craftbukkit.v1_8_R2.scheduler.CraftTask.run(CraftTask.java:71)
[16:37:09] [Craft Scheduler Thread - 0/WARN]:     at org.bukkit.craftbukkit.v1_8_R2.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
[16:37:09] [Craft Scheduler Thread - 0/WARN]:     at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
[16:37:09] [Craft Scheduler Thread - 0/WARN]:     at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
[16:37:09] [Craft Scheduler Thread - 0/WARN]:     at java.lang.Thread.run(Unknown Source)

This shows a few times before it gives up and lastly shows:
[16:37:12] [Craft Scheduler Thread - 0/INFO]: [MarioKart] Using resource pack: http://bit.ly/1gZMyUX

What version of the product are you using?
7.2.3

Do you have an error log of what happened?
Above.

Please provide any additional information below.