Mob Spawners Work in Light Level Above 12

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Please add a photo of the setup you are describing.

Also confirmed in direct sunlight. Spawners remain active.

Having tested this further, I can confirm that this is an issue.

In the setup pictured, area around the spawner has a light level of >12 which should prevent all spawns.

^{9x9 room of glowstone with glowstone pillars around spawner}

This setup would give light levels as shown here:

Cannot reproduce this since the 0.16.1 update, so I'm assuming it's fixed.

Issue is not fixed. however is wider effected than reported. Issue is two fold -
1. Spawner will not spawn even if dark. When this issue is happening removing light sources (torches, redstone lights, etc) the room will appear dark. however login out of the realm and back in will show that even though all lights are off/gone, room is sitll completely lit up. I've attached an example image of this. Notice all redstone lights are off but room is completely lit up. Other areas do not seem to be effected.
2. When issue is occurring, adding light sources to a room will not light up the area. Once again the room will appear to be lit up, but logging out and back will show that the room is now dark. I don't have an image of this as mobs keep appearing and attacking.

This issue does not happen all the time. However on our realm (and the previous realm before the reset shortly after 1.0 release) was having this issue. When it is occurring it appears to effect all spanners at the same time, locking the lighting of the room till "Something" resets and the lighting in spawn rooms once again start working again. Cause and fix of issue is currently unknown.

Also to note - when spawners are working properly, logging out and back in still shows correct lighting inside a spawn room. (aka if lights are off it is dark, if lights are on it is light)

Redstone lamps all off. Only source of light in room. Room appears dark when lamps turned off but no spawns. Logging out and back in shows this image.

All torches removed inside area. this is the image after logging out and back in. As you see all area is lit up, but no light sources are in area.

@unknown: That must be a bug in lighting in general, not a bug in mob spawners. Please file a new ticket if it has not already been reported.

But the issue only seems to be contained within the mob spawners themselves. Other light sources do not seem to be effected (at least as far as I can tell). If i turn off a red stone light, and log out and back in it stays off and the area around it stays dark. Only when it (or some other light source) is in proximity of a mob spawner does this appear to be an issue. Wouldn't that be in this ticket and not a general lighting issue?

As we have no F3 option, I can't tell when the issue is happening what the actual light situation is. If it's just a lighting glitch that isn't reporting right (although not sure why Mob spawners would cease/continue to work if this was the case) or if the issue is actually changing the lighting levels country to the light sources available.

@unknown: That's indeed interesting, but even so it's still not the same bug as the one originally reported in this ticket: mob spawners, at least, no longer spawn mobs under light.

vai tomar no cu