Mobs Rarley Spawning Above And Below Ground

Definitely cannot confirm...

Please force a crash by pressing F3 + C for 10 seconds while in-game and attach the crash report ([minecraft|http://hopper.minecraft.net/help/finding-minecraft-data-folder]/crash-reports/crash-<DATE>-client.txt) here.

Please also attach the console output of the server.

Sorry ive been rather busy today but please find attached the crash report, unfortunately i dont have access to the console output at my friend manages the server, and is not regularly available.

Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.

Time: 14/11/13 16:55
Description: Manually triggered debug crash

java.lang.Throwable
at azd.o(SourceFile:1383)
at azd.ad(SourceFile:753)
at azd.e(SourceFile:704)
at net.minecraft.client.main.Main.main(SourceFile:103)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

– Head –
Stacktrace:
at biz.a(SourceFile:284)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [bje['*****'/38446, l='MpServer', x=519.74, y=72.62, z=1502.94]]
Chunk stats: MultiplayerChunkCache: 225, 225
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (-112,64,-40), Chunk: (at 0,4,8 in -7,-3; contains blocks -112,0,-48 to -97,255,-33), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
Level time: 16855964 game time, 16995398 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: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 16 total; [bje['*****'/38446, l='MpServer', x=519.74, y=72.62, z=1502.94], xo['arrow'/38464, l='MpServer', x=536.53, y=69.94, z=1492.28], uq['Bat'/38466, l='MpServer', x=589.44, y=18.45, z=1491.44], xo['arrow'/38447, l='MpServer', x=523.22, y=71.16, z=1498.00], vw['item.tile.sandStone.default'/38454, l='MpServer', x=492.00, y=64.13, z=1468.75], vw['item.tile.sandStone.default'/38455, l='MpServer', x=491.47, y=65.13, z=1467.41], vw['item.item.sulphur'/38452, l='MpServer', x=492.19, y=64.13, z=1469.06], vw['item.tile.sandStone.default'/38453, l='MpServer', x=491.84, y=64.13, z=1471.06], wy['Slime'/38451, l='MpServer', x=445.38, y=33.00, z=1514.63], us['Chicken'/38462, l='MpServer', x=520.84, y=68.00, z=1507.84], vw['item.tile.sandStone.default'/38460, l='MpServer', x=489.34, y=66.13, z=1472.84], wx['Skeleton'/38461, l='MpServer', x=492.72, y=62.02, z=1581.75], vw['item.tile.sandStone.default'/38458, l='MpServer', x=490.19, y=64.13, z=1470.75], vw['item.tile.sandStone.default'/38459, l='MpServer', x=490.19, y=66.13, z=1473.25], vw['item.tile.sandStone.default'/38456, l='MpServer', x=490.13, y=64.13, z=1468.56], vw['item.tile.sandStone.default'/38457, l='MpServer', x=493.25, y=64.13, z=1468.72]]
Retry entities: 0 total; []
Server brand: vanilla
Server type: Non-integrated multiplayer server
Stacktrace:
at biz.a(SourceFile:284)
at azd.b(SourceFile:1951)
at azd.e(SourceFile:713)
at net.minecraft.client.main.Main.main(SourceFile:103)

😞

Been noticing this too. Seems to be affecting Vanilla Servers, in our case, we've had fewer than 10 spawns in one large area.

What setting do you have for view distance on your servers?

View distance 6.

Turns out this issue is a duplicate of MC-2536. If you set your view distance to 10, it should correct the problem.