Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Samebug tips

  1. ,
    Expert tip

    Take a look at this blog post on how to set up Grid2 https://goo.gl/rxzbE6. A user related (in the email group on the source) that using older selenium libs solves this exception.

Solutions on the web

via GitHub by xXLightAngelXx
, 1 year ago
Unexpected error
via GitHub by Niduin
, 2 years ago
Unexpected error
via GitHub by prodkid
, 2 years ago
Unexpected error
java.lang.NullPointerException: Unexpected error	at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:213)	at net.minecraftforge.common.UsernameCache.getLastKnownUsername(UsernameCache.java:101)	at crazypants.enderio.teleport.anchor.BlockTravelAnchor.sendPrivateChatMessage(BlockTravelAnchor.java:147)	at crazypants.enderio.teleport.telepad.BlockTelePad.openGui(BlockTelePad.java:135)	at crazypants.enderio.teleport.telepad.BlockTelePad.openGui(BlockTelePad.java:125)	at com.enderio.core.common.BlockEnder.func_149727_a(BlockEnder.java:102)	at crazypants.enderio.BlockEio.func_149727_a(BlockEio.java:44)	at net.minecraft.client.multiplayer.PlayerControllerMP.func_78760_a(PlayerControllerMP.java:326)	at net.minecraft.client.Minecraft.func_147121_ag(Minecraft.java:1447)	at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1953)	at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:973)	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:898)	at net.minecraft.client.main.Main.main(SourceFile:148)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)