Aronthaer

– Head –
Stacktrace:
at rx.a_(SourceFile:409)
at zo.a(SourceFile:1818)
at rx.a(SourceFile:1198)
at bkg.a(SourceFile:373)
at bbz.au(SourceFile:1450)
at bbz.ax(SourceFile:1934)
at bbz.aw(SourceFile:1752)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [bmg['Aronthaer'/256, l='MpServer', x=268.85, y=90.96, z=146.86]]
Chunk stats: MultiplayerChunkCache: 273, 273
Level seed: 0
Level generator: ID 03 - amplified, ver 0. Features enabled: false
Level generator options:
Level spawn location: World: (252,64,248), Chunk: (at 12,4,8 in 15,15; contains blocks 240,0,240 to 255,255,255), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 1181 game time, 1181 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
Forced entities: 96 total; [zb['Skeleton'/128, l='MpServer', x=236.50, y=18.00, z=175.91], bmg['Aronthaer'/256, l='MpServer', x=268.85, y=90.96, z=146.86], wc['Squid'/129, l='MpServer', x=260.65, y=60.26, z=164.07], yn['Creeper'/130, l='MpServer', x=240.50, y=16.00, z=181.50], vq['Bat'/131, l='MpServer', x=245.93, y=17.86, z=197.54], zf['Zombie'/771, l='MpServer', x=262.50, y=15.00, z=187.50], vq['Bat'/132, l='MpServer', x=249.57, y=12.20, z=202.31], yn['Creeper'/772, l='MpServer', x=288.50, y=20.00, z=105.50], vq['Bat'/133, l='MpServer', x=251.33, y=17.00, z=210.53], yn['Creeper'/773, l='MpServer', x=291.50, y=20.00, z=106.50], zb['Skeleton'/134, l='MpServer', x=250.50, y=19.00, z=213.50], yn['Creeper'/774, l='MpServer', x=292.50, y=20.00, z=106.50], zb['Skeleton'/135, l='MpServer', x=252.50, y=19.00, z=211.50], yo['Enderman'/775, l='MpServer', x=284.50, y=20.00, z=103.50], zb['Skeleton'/136, l='MpServer', x=248.50, y=19.00, z=214.50], zd['Spider'/137, l='MpServer', x=246.50, y=18.00, z=217.50], vq['Bat'/138, l='MpServer', x=243.27, y=16.32, z=226.74], vq['Bat'/526, l='MpServer', x=238.97, y=19.31, z=117.50], vq['Bat'/527, l='MpServer', x=251.72, y=17.88, z=200.91], zf['Zombie'/783, l='MpServer', x=265.50, y=18.00, z=189.50], vq['Bat'/528, l='MpServer', x=254.50, y=17.91, z=208.75], vq['Bat'/529, l='MpServer', x=247.72, y=18.10, z=208.25], zf['Zombie'/661, l='MpServer', x=254.50, y=18.00, z=194.50], zb['Skeleton'/150, l='MpServer', x=268.50, y=29.00, z=151.50], zf['Zombie'/662, l='MpServer', x=255.50, y=18.00, z=188.50], wc['Squid'/151, l='MpServer', x=263.19, y=59.23, z=175.27], wc['Squid'/152, l='MpServer', x=256.00, y=61.13, z=172.69], wc['Squid'/153, l='MpServer', x=268.00, y=61.91, z=157.64], wc['Squid'/154, l='MpServer', x=254.05, y=62.17, z=167.35], zf['Zombie'/155, l='MpServer', x=266.69, y=22.00, z=183.41], yn['Creeper'/156, l='MpServer', x=271.03, y=24.00, z=187.47], yn['Creeper'/157, l='MpServer', x=263.00, y=21.00, z=182.59], yn['Creeper'/158, l='MpServer', x=268.63, y=18.00, z=186.28], zf['Zombie'/159, l='MpServer', x=266.50, y=18.00, z=185.97], zf['Zombie'/800, l='MpServer', x=291.16, y=24.00, z=201.16], yn['Creeper'/801, l='MpServer', x=291.75, y=24.00, z=201.75], vq['Bat'/290, l='MpServer', x=253.29, y=17.08, z=208.14], zf['Zombie'/674, l='MpServer', x=285.50, y=24.00, z=98.50], yn['Creeper'/802, l='MpServer', x=290.50, y=24.00, z=201.50], zf['Zombie'/675, l='MpServer', x=286.50, y=24.00, z=96.50], vq['Bat'/167, l='MpServer', x=280.61, y=27.74, z=187.41], zb['Skeleton'/168, l='MpServer', x=281.50, y=21.00, z=194.50], yn['Creeper'/169, l='MpServer', x=280.50, y=21.00, z=194.50], vq['Bat'/297, l='MpServer', x=211.42, y=33.04, z=154.58], vq['Bat'/172, l='MpServer', x=294.72, y=15.10, z=135.47], zf['Zombie'/684, l='MpServer', x=285.50, y=24.00, z=98.50], zb['Skeleton'/173, l='MpServer', x=295.50, y=31.00, z=172.50], zf['Zombie'/685, l='MpServer', x=286.50, y=24.00, z=96.50], zf['Zombie'/175, l='MpServer', x=319.50, y=33.00, z=118.50], vq['Bat'/176, l='MpServer', x=301.62, y=22.10, z=183.48], wa['Sheep'/177, l='MpServer', x=318.44, y=85.00, z=170.22], wa['Sheep'/178, l='MpServer', x=313.50, y=90.00, z=179.50], wa['Sheep'/179, l='MpServer', x=314.84, y=87.00, z=175.19], wa['Sheep'/180, l='MpServer', x=317.75, y=110.00, z=201.13], wa['Sheep'/181, l='MpServer', x=318.59, y=115.00, z=206.59], wa['Sheep'/182, l='MpServer', x=318.50, y=116.00, z=208.50], wa['Sheep'/183, l='MpServer', x=314.03, y=114.00, z=209.88], zf['Zombie'/188, l='MpServer', x=328.50, y=39.00, z=120.50], wa['Sheep'/189, l='MpServer', x=325.47, y=92.00, z=183.44], wa['Sheep'/190, l='MpServer', x=325.50, y=92.00, z=184.53], wa['Sheep'/191, l='MpServer', x=326.50, y=93.00, z=183.50], wa['Sheep'/192, l='MpServer', x=320.53, y=87.00, z=178.50], wa['Sheep'/193, l='MpServer', x=323.69, y=89.00, z=182.50], wa['Sheep'/194, l='MpServer', x=327.50, y=110.00, z=209.50], wa['Sheep'/195, l='MpServer', x=324.50, y=114.00, z=214.50], wa['Sheep'/196, l='MpServer', x=324.50, y=113.00, z=211.50], wa['Sheep'/197, l='MpServer', x=325.50, y=112.00, z=210.50], zb['Skeleton'/199, l='MpServer', x=342.50, y=90.00, z=173.50], zb['Skeleton'/200, l='MpServer', x=342.50, y=90.00, z=173.50], zb['Skeleton'/201, l='MpServer', x=340.50, y=91.00, z=175.00], zf['Zombie'/586, l='MpServer', x=249.98, y=20.26, z=136.44], vu['Cow'/78, l='MpServer', x=189.50, y=63.00, z=160.50], zd['Spider'/591, l='MpServer', x=238.50, y=20.00, z=141.50], yn['Creeper'/596, l='MpServer', x=275.50, y=63.00, z=210.50], yn['Creeper'/597, l='MpServer', x=274.50, y=63.00, z=208.50], zf['Zombie'/341, l='MpServer', x=341.50, y=28.00, z=158.50], yn['Creeper'/344, l='MpServer', x=343.50, y=28.00, z=154.50], yn['Creeper'/605, l='MpServer', x=275.50, y=63.00, z=210.50], yn['Creeper'/350, l='MpServer', x=235.50, y=15.00, z=199.50], yn['Creeper'/606, l='MpServer', x=274.50, y=63.00, z=208.50], zb['Skeleton'/479, l='MpServer', x=275.50, y=25.00, z=187.50], yn['Creeper'/97, l='MpServer', x=213.50, y=33.00, z=153.50], wa['Sheep'/98, l='MpServer', x=220.50, y=70.00, z=190.50], wa['Sheep'/99, l='MpServer', x=220.50, y=71.00, z=187.50], wa['Sheep'/100, l='MpServer', x=221.50, y=75.00, z=187.50], zd['Spider'/361, l='MpServer', x=299.50, y=30.00, z=171.50], wc['Squid'/112, l='MpServer', x=229.56, y=62.25, z=125.91], vq['Bat'/113, l='MpServer', x=231.11, y=21.13, z=141.60], wc['Squid'/114, l='MpServer', x=236.75, y=60.34, z=124.94], yn['Creeper'/115, l='MpServer', x=236.81, y=21.00, z=173.06], vq['Bat'/116, l='MpServer', x=239.14, y=17.06, z=203.13], zb['Skeleton'/117, l='MpServer', x=238.50, y=16.00, z=180.50], wa['Sheep'/118, l='MpServer', x=226.53, y=83.00, z=190.19], zd['Spider'/119, l='MpServer', x=236.16, y=15.00, z=197.31], yn['Creeper'/120, l='MpServer', x=235.50, y=17.00, z=204.06], vq['Bat'/121, l='MpServer', x=246.65, y=16.05, z=199.72]]
Retry entities: 0 total; []
Server brand: vanilla
Server type: Integrated singleplayer server
Stacktrace:
at bkh.a(SourceFile:364)
at bbz.b(SourceFile:2496)
at bbz.a(SourceFile:400)
at net.minecraft.client.main.Main.main(SourceFile:122)

– System Details –
Details:
Minecraft Version: 15w49a
Operating System: Windows 8.1 (amd64) version 6.3
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 164588992 bytes (156 MB) / 330424320 bytes (315 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Launched Version: 15w49a
LWJGL: 2.9.4
OpenGL: Intel(R) HD Graphics 4000 GL version 4.0.0 - Build 10.18.10.3621, Intel
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: No
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs:
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 4x Intel(R) Core(TM) i3-3120M CPU @ 2.50GHz

I believe that horses aren't meant to display more than 30 hearts. if you think about it, that command would make the horse display
49,999 1/2 hearts on-screen, which would be ridiculous and impractical. since the most a survival horse can have for health is 30 hearts, I'm guessing they capped it there for a reason.