The bug
Spawners do not spawn entities at the correct position anymore or do not spawn them at all, which might be caused by the fix of MC-90101
Entities with NBT tags
Spawners spawn any entity that has NBT tags other than id but no Pos tag at (0|0|z). This means only their z-coordinate is used.
Monsters
Monsters with no other NBT tags than id an no Pos tag are spawned at (0|y|z). This means only their y- and z-coordinate is used.
How to reproduce
Use the following command
/setblock ~ ~1 ~ mob_spawner 0 replace {SpawnData:{id:"ArmorStand",NoGravity:1b}}Related issues
is duplicated by
MC-97494
Spawners are not spawning monsters anymore
MC-97503
Spawners doesn't work
MC-97516
Monster Spawners not spawning Monsters
MC-97541
mob_spawner does not work
MC-97546
Mob Spawner Spwans Mobs in wrong place
MC-97550
Mob spawners are broken
MC-97570
Spawners not responding in the new 1.9 prerelease 2
MC-97576
Mobspawner doesn't work/spawn mobs
MC-97590
Spawers don't spawn anything
MC-97610
Natural spawners don't spawn monsters
MC-97630
Monster Spawners don't work in 1.9 pre release 2
MC-97634
Hostile Mobs do not spawn from spawners or otherwise
MC-97657
Spider Mod Spawners Stopped Spawning
MC-97665
Mob Spawners do not spawn Mobs
MC-97711
Skeleton spawner not spawning!
MC-97716
Hostile Mob Bug
MC-97728
Dungeons or Mob Spawner
MC-97741
Spawners are no longer spawning mobs
MC-97760
Mobspawners didn't work
MC-97791
Minecraft: Naturally Generated Spawner Does Not Spawn Mobs
MC-97812
skeleton spawner not working
MC-97815
Mob Spawners Not Working in 1.9 Pre Release 2
MC-97872
Mob Spawner not spawning mobs
MC-97889
Blazes are not spawning
MC-97915
Skeleton doesn't spawn from his spawner
Attachments
Comments
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In a 1.9 CTM map I've been making, I witness mobs only spawning at X=0.
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all spawns at x=0
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My free food spawners (1 cow 1 sheep) sparkle but create no mobs
Irbis
Seems to be caused by fix of mine bug: MC-90101
Hope 1.9 pre 3 will also fix this one without breaking fix of mine.
SunCat
Armorstands actually spawn at 0 0 Z
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This actually broke every spawner in the server where I am.
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I have the same problem, on a Server that I own, none of the mob spawners is actually spawning mobs.
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Yeah, I've seen this as well.
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In Pre-release2:Can confirm, no mobs are spawning at any difficulty in any naturally generated spawner (tested Skeleton, Spider and Zombie on both a newly generated world as well as on a pre-existing server).
Cavinator1
Can confirm. Suddenly no mobs are spawning at all with any of my custom spawners in my map.
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Can confirm, naturally generated cave spider spawners in a new survival world on my server are never spawning anything despite being in complete darkness.
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Yep... confirmed on my vanilla 1.9pre-2 server as well
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Confirm on pre2. World created in 15w49b and upgraded to all later snapshots. Both skeleton and spider spawner not working.
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I can confirm. prerelease two.
I made sure my xp grinder was up to wiki specifications, and I did all kinds of troubleshooting. neither of my zimbie dungeon spawners work. They rotate at the same speed, consistently.
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Yep. It has to be a bug, because in my survival world in Minecraft 1.9 Pre-2 my skeleton grinder with a dungeon spawner does not spawn anything. Hope it'll be fixed before releasing 1.9.
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Confirmed. Zombie, Skeleton, Spider, and blaze not spawning in my current map (created originally 1.8.9 and now running in 1.9 Pre-2).
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I have been having issues and it was a fresh pre-2 map, i first noticed when i went into the nether. blazes did not spawn and i was on my way to the end.
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It isn't fixed. In my world (created in older snapshots of 1.9 and now running in 1.9 Pre-2), i tried to build an xp farm with spawner and skeletons (in my case) doesn't spawn. The bug fix will be added in the next snapshot or what??
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It says fixed in "future version", not now. So, yes, probably the next prerelease, or the main release.
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I would think they would patch it in a new pre-release. Just incase if that patch introduces a new bug
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@akiva silver You would think, but considering they're planning on releasing tomorrow... there are quite a few other bugs that have yet to be resolved as well...
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@unknown
UPDATE: the release date was moved to Monday, 29th of February 2016
SunCat
Confirmed the fix