Minecraft Forums

I run a home based minecraft server for my kids and some friends. Connections are from inside and outside my firewall. We don't run any mods or texture packs. After months of things running smoothly, minecraft has begun to crash on one of my boys accounts.

Minecraft works fine on single player.

We have multiple PCs in our LAN. A PC that works fine and connects to the server for one login Immediately crashes when the other is used.

It feels like corrupted user information on the server. Can this be fixed?

Minecraft dumps the following error report:


---- Minecraft Crash Report ----
// Don't be sad, have a hug! <3

Time: 9/3/12 10:39 AM
Description: Unexpected error

java.lang.NullPointerException
at avz.a(SourceFile:29)
at awh.a(SourceFile:48)
at awh.a(SourceFile:17)
at avy.a(SourceFile:168)
at aul.a(SourceFile:64)
at aub.b(SourceFile:115)
at auw.a(SourceFile:801)
at auw.b(SourceFile:685)
at net.minecraft.client.Minecraft.J(SourceFile:607)
at net.minecraft.client.Minecraft.run(SourceFile:535)
at java.lang.Thread.run(Unknown Source)

Relevant Details:
- Minecraft Version: 1.3.2
- Operating System: Windows XP (x86) version 5.1
- Java Version: 1.7.0_07, Oracle Corporation
- Java VM Version: Java HotSpot™ Client VM (mixed mode), Oracle Corporation
- Memory: 30795192 bytes (29 MB) / 96899072 bytes (92 MB) up to 810942464 bytes (773 MB)
- JVM Flags: 1 total; -Xmx800m
- LWJGL: 2.4.2
- OpenGL: Intel 915GM GL version 1.4.0 - Build 4.14.10.4410, Intel
- Is Modded: Probably not
- Type: Client
- Texture Pack: Default
- Profiler Position: N/A (disabled)
- World MpServer Entities: 71 total; [atg['cuitvlugt'/392859, l='MpServer', x=-259.30, y=52.62, z=187.24], oa['Zombie'/392291, l='MpServer', x=-286.44, y=38.00, z=126.13], no['Creeper'/392268, l='MpServer', x=-253.69, y=24.00, z=194.50], oa['Zombie'/392193, l='MpServer', x=-240.50, y=98.00, z=187.50], nj['item.tile.stonebrick'/392206, l='MpServer', x=-280.63, y=15.13, z=204.34], nx['Skeleton'/390285, l='MpServer', x=-273.11, y=38.00, z=199.81], no['Creeper'/392427, l='MpServer', x=-237.31, y=61.44, z=250.50], nx['Skeleton'/392398, l='MpServer', x=-233.50, y=63.00, z=265.50], nx['Skeleton'/392390, l='MpServer', x=-235.50, y=78.00, z=227.50], oa['Zombie'/392353, l='MpServer', x=-219.50, y=12.00, z=130.50], nz['Spider'/392573, l='MpServer', x=-336.38, y=52.00, z=191.88], nz['Spider'/392571, l='MpServer', x=-268.50, y=64.00, z=244.50], mo['Chicken'/378595, l='MpServer', x=-305.16, y=73.00, z=261.84], mo['Chicken'/378598, l='MpServer', x=-303.50, y=82.00, z=265.50], mo['Chicken'/378599, l='MpServer', x=-287.50, y=67.00, z=261.50], mo['Chicken'/378596, l='MpServer', x=-290.50, y=78.00, z=260.50], mo['Chicken'/378597, l='MpServer', x=-291.50, y=68.00, z=261.50], no['Creeper'/392466, l='MpServer', x=-252.50, y=43.00, z=126.50], nj['item.tile.dirt'/392657, l='MpServer', x=-289.88, y=14.13, z=216.03], mz['Wolf'/378369, l='MpServer', x=-272.16, y=63.00, z=239.16], nx['Skeleton'/380649, l='MpServer', x=-278.94, y=15.00, z=183.50], oa['Zombie'/392637, l='MpServer', x=-282.50, y=24.00, z=177.50], aur['Hargrove'/243165, l='MpServer', x=-288.84, y=26.00, z=212.69], ny['Slime'/380620, l='MpServer', x=-222.38, y=28.00, z=109.63], nz['Spider'/392576, l='MpServer', x=-338.66, y=52.00, z=190.22], oa['Zombie'/392770, l='MpServer', x=-218.50, y=21.00, z=114.50], oa['Zombie'/392771, l='MpServer', x=-213.50, y=21.00, z=120.50], ms['Ocelot'/392819, l='MpServer', x=-339.50, y=97.00, z=188.50], nx['Skeleton'/392723, l='MpServer', x=-243.50, y=102.00, z=195.50], nx['Skeleton'/392751, l='MpServer', x=-312.09, y=18.00, z=197.50], nx['Skeleton'/392747, l='MpServer', x=-292.50, y=36.00, z=244.50], nx['Skeleton'/392752, l='MpServer', x=-321.47, y=21.16, z=183.69], oa['Zombie'/392838, l='MpServer', x=-306.50, y=27.00, z=233.50], oa['Zombie'/392835, l='MpServer', x=-249.50, y=28.00, z=251.50], oa['Zombie'/392856, l='MpServer', x=-219.50, y=46.00, z=222.50], no['Creeper'/392854, l='MpServer', x=-241.50, y=93.00, z=181.50], oa['Zombie'/392855, l='MpServer', x=-222.50, y=46.00, z=222.50], oa['Zombie'/392850, l='MpServer', x=-329.50, y=81.00, z=198.50], mo['Chicken'/378073, l='MpServer', x=-309.50, y=97.00, z=125.50], mo['Chicken'/378072, l='MpServer', x=-306.50, y=84.00, z=126.50], mo['Chicken'/378075, l='MpServer', x=-309.50, y=97.00, z=125.50], mo['Chicken'/378074, l='MpServer', x=-309.50, y=97.00, z=125.50], nj['item.item.egg'/390983, l='MpServer', x=-306.88, y=84.13, z=126.13], mo['Chicken'/377859, l='MpServer', x=-274.50, y=70.00, z=111.50], mo['Chicken'/377861, l='MpServer', x=-274.44, y=73.00, z=115.47], mo['Chicken'/377860, l='MpServer', x=-276.50, y=70.00, z=115.50], nj['item.tile.stonebrick'/391299, l='MpServer', x=-260.44, y=19.13, z=160.59], oa['Zombie'/391414, l='MpServer', x=-230.50, y=65.00, z=137.50], mo['Chicken'/377616, l='MpServer', x=-233.50, y=69.00, z=113.50], aur['abbytron'/302499, l='MpServer', x=-289.72, y=26.00, z=212.41], ny['Slime'/383789, l='MpServer', x=-192.78, y=17.00, z=142.78], oa['Zombie'/391629, l='MpServer', x=-300.50, y=29.00, z=221.97], ms['Ocelot'/391700, l='MpServer', x=-188.78, y=72.00, z=187.28], no['Creeper'/387873, l='MpServer', x=-290.50, y=29.00, z=159.50], oa['Zombie'/391725, l='MpServer', x=-298.50, y=56.00, z=198.91], aur['muitvlugt'/381105, l='MpServer', x=-290.16, y=26.00, z=213.56], nz['Spider'/391803, l='MpServer', x=-294.47, y=36.00, z=240.50], no['Creeper'/391802, l='MpServer', x=-296.69, y=34.00, z=224.97], no['Creeper'/391830, l='MpServer', x=-324.50, y=85.00, z=165.50], nx['Skeleton'/391885, l='MpServer', x=-303.50, y=88.00, z=161.50], oa['Zombie'/392009, l='MpServer', x=-249.50, y=29.00, z=254.50], oa['Zombie'/392010, l='MpServer', x=-251.50, y=30.00, z=256.06], oa['Zombie'/392015, l='MpServer', x=-264.50, y=63.00, z=224.50], no['Creeper'/392093, l='MpServer', x=-337.66, y=16.00, z=263.50], nx['Skeleton'/392144, l='MpServer', x=-289.50, y=68.00, z=251.50], oa['Zombie'/392917, l='MpServer', x=-197.50, y=13.00, z=124.50], oa['Zombie'/392922, l='MpServer', x=-314.50, y=17.00, z=181.50], no['Creeper'/392948, l='MpServer', x=-299.50, y=49.00, z=267.50], nx['Skeleton'/392951, l='MpServer', x=-267.50, y=16.00, z=240.50], oa['Zombie'/392962, l='MpServer', x=-239.50, y=46.00, z=249.50], oa['Zombie'/392963, l='MpServer', x=-240.50, y=46.00, z=246.50]]
- World MpServer Players: 4 total; [atg['cuitvlugt'/392859, l='MpServer', x=-259.30, y=52.62, z=187.24], aur['Hargrove'/243165, l='MpServer', x=-288.84, y=26.00, z=212.69], aur['abbytron'/302499, l='MpServer', x=-289.72, y=26.00, z=212.41], aur['muitvlugt'/381105, l='MpServer', x=-290.16, y=26.00, z=213.56]]
- World MpServer Chunk Stats: MultiplayerChunkCache: 155
- Forced Entities: 80 total; [nj['item.tile.stonebrick'/392964, l='MpServer', x=-290.63, y=27.88, z=214.88], atg['cuitvlugt'/392859, l='MpServer', x=-259.30, y=52.62, z=187.24], oa['Zombie'/392770, l='MpServer', x=-218.50, y=21.00, z=114.50], oa['Zombie'/392771, l='MpServer', x=-213.50, y=21.00, z=120.50], nj['item.tile.stonebrick'/392206, l='MpServer', x=-280.63, y=15.13, z=204.34], no['Creeper'/392427, l='MpServer', x=-237.31, y=61.44, z=250.50], oa['Zombie'/392291, l='MpServer', x=-286.44, y=38.00, z=126.13], nj['item.item.egg'/390983, l='MpServer', x=-306.88, y=84.13, z=126.13], no['Creeper'/392093, l='MpServer', x=-337.66, y=16.00, z=263.50], nz['Spider'/392573, l='MpServer', x=-336.38, y=52.00, z=191.88], nz['Spider'/392571, l='MpServer', x=-268.50, y=64.00, z=244.50], aur['abbytron'/302499, l='MpServer', x=-289.72, y=26.00, z=212.41], oa['Zombie'/392922, l='MpServer', x=-314.50, y=17.00, z=181.50], no['Creeper'/391830, l='MpServer', x=-324.50, y=85.00, z=165.50], mo['Chicken'/377859, l='MpServer', x=-274.50, y=70.00, z=111.50], nj['item.tile.dirt'/392657, l='MpServer', x=-289.88, y=14.13, z=216.03], mo['Chicken'/377861, l='MpServer', x=-274.44, y=73.00, z=115.47], mo['Chicken'/377860, l='MpServer', x=-276.50, y=70.00, z=115.50], aur['Hargrove'/243165, l='MpServer', x=-288.84, y=26.00, z=212.69], ms['Ocelot'/391700, l='MpServer', x=-188.78, y=72.00, z=187.28], no['Creeper'/387873, l='MpServer', x=-290.50, y=29.00, z=159.50], oa['Zombie'/392917, l='MpServer', x=-197.50, y=13.00, z=124.50], nj['item.tile.stonebrick'/391299, l='MpServer', x=-260.44, y=19.13, z=160.59], oa['Zombie'/391725, l='MpServer', x=-298.50, y=56.00, z=198.91], nx['Skeleton'/392398, l='MpServer', x=-233.50, y=63.00, z=265.50], nx['Skeleton'/392390, l='MpServer', x=-235.50, y=78.00, z=227.50], nj['item.item.egg'/390983, l='MpServer', x=-306.88, y=84.13, z=126.13], no['Creeper'/392268, l='MpServer', x=-253.69, y=24.00, z=194.50], nj['item.tile.stonebrick'/391299, l='MpServer', x=-260.44, y=19.13, z=160.59], nj['item.tile.dirt'/392657, l='MpServer', x=-289.88, y=14.13, z=216.03], aur['abbytron'/302499, l='MpServer', x=-289.72, y=26.00, z=212.41], ms['Ocelot'/392819, l='MpServer', x=-339.50, y=97.00, z=188.50], mz['Wolf'/378369, l='MpServer', x=-272.16, y=63.00, z=239.16], aur['muitvlugt'/381105, l='MpServer', x=-290.16, y=26.00, z=213.56], no['Creeper'/392948, l='MpServer', x=-299.50, y=49.00, z=267.50], nx['Skeleton'/392951, l='MpServer', x=-267.50, y=16.00, z=240.50], nx['Skeleton'/392144, l='MpServer', x=-289.50, y=68.00, z=251.50], aur['muitvlugt'/381105, l='MpServer', x=-290.16, y=26.00, z=213.56], nx['Skeleton'/380649, l='MpServer', x=-278.94, y=15.00, z=183.50], nj['item.tile.stonebrick'/390133, l='MpServer', x=-269.13, y=18.13, z=170.41], mo['Chicken'/378073, l='MpServer', x=-309.50, y=97.00, z=125.50], mo['Chicken'/378072, l='MpServer', x=-306.50, y=84.00, z=126.50], mo['Chicken'/378075, l='MpServer', x=-309.50, y=97.00, z=125.50], oa['Zombie'/392637, l='MpServer', x=-282.50, y=24.00, z=177.50], mo['Chicken'/378074, l='MpServer', x=-309.50, y=97.00, z=125.50], oa['Zombie'/392353, l='MpServer', x=-219.50, y=12.00, z=130.50], oa['Zombie'/392838, l='MpServer', x=-306.50, y=27.00, z=233.50], oa['Zombie'/392835, l='MpServer', x=-249.50, y=28.00, z=251.50], nx['Skeleton'/391885, l='MpServer', x=-303.50, y=88.00, z=161.50], oa['Zombie'/392009, l='MpServer', x=-249.50, y=29.00, z=254.50], oa['Zombie'/392010, l='MpServer', x=-251.50, y=30.00, z=256.06], oa['Zombie'/391414, l='MpServer', x=-230.50, y=65.00, z=137.50], aur['Hargrove'/243165, l='MpServer', x=-288.84, y=26.00, z=212.69], nx['Skeleton'/392723, l='MpServer', x=-243.50, y=102.00, z=195.50], oa['Zombie'/392962, l='MpServer', x=-239.50, y=46.00, z=249.50], oa['Zombie'/392856, l='MpServer', x=-219.50, y=46.00, z=222.50], oa['Zombie'/392963, l='MpServer', x=-240.50, y=46.00, z=246.50], oa['Zombie'/392015, l='MpServer', x=-264.50, y=63.00, z=224.50], no['Creeper'/392854, l='MpServer', x=-241.50, y=93.00, z=181.50], mo['Chicken'/378595, l='MpServer', x=-305.16, y=73.00, z=261.84], oa['Zombie'/392855, l='MpServer', x=-222.50, y=46.00, z=222.50], mo['Chicken'/378598, l='MpServer', x=-303.50, y=82.00, z=265.50], oa['Zombie'/392850, l='MpServer', x=-329.50, y=81.00, z=198.50], mo['Chicken'/378599, l='MpServer', x=-287.50, y=67.00, z=261.50], mo['Chicken'/378596, l='MpServer', x=-290.50, y=78.00, z=260.50], mo['Chicken'/378597, l='MpServer', x=-291.50, y=68.00, z=261.50], no['Creeper'/392466, l='MpServer', x=-252.50, y=43.00, z=126.50], oa['Zombie'/392193, l='MpServer', x=-240.50, y=98.00, z=187.50], ny['Slime'/380620, l='MpServer', x=-222.38, y=28.00, z=109.63], nx['Skeleton'/392751, l='MpServer', x=-312.09, y=18.00, z=197.50], nj['item.tile.stonebrick'/392206, l='MpServer', x=-280.63, y=15.13, z=204.34], nx['Skeleton'/392747, l='MpServer', x=-292.50, y=36.00, z=244.50], ny['Slime'/383789, l='MpServer', x=-192.78, y=17.00, z=142.78], nz['Spider'/391803, l='MpServer', x=-294.47, y=36.00, z=240.50], no['Creeper'/391802, l='MpServer', x=-296.69, y=34.00, z=224.97], nx['Skeleton'/392752, l='MpServer', x=-321.47, y=21.16, z=183.69], nx['Skeleton'/390285, l='MpServer', x=-273.11, y=38.00, z=199.81], oa['Zombie'/391629, l='MpServer', x=-300.50, y=29.00, z=221.97], nz['Spider'/392576, l='MpServer', x=-338.66, y=52.00, z=190.22], mo['Chicken'/377616, l='MpServer', x=-233.50, y=69.00, z=113.50]]
- Retry Entities: 0 total; []

The server is my own and we are not running mods.
6 other users can log in without problem.
If I Log in with one user , then log out, switch users to the proematic user, and try to log in again, the client crashes.
There is no error message in the server log.
The problem seems to be related to the user data on the server side.

I deleted the .dat file in the /users folder.
The user was able to log in. (Level 0, with no inventory, in the starting area)

Thanks for the help!