First, this is not a duplicate of MC-16311, see below.
I posit at least one of these possibilities:1. Zombie spawn conditions have changed (light level?)
2. Zombie behavior (detection skills?) has changed3. Zombie sieges event activity has changed (happens all the time or never ends?)4. The change between 13w22a and 13w23 made my lit caverns count as unlit, and would perhaps require removing and replacing all of my torches to count as properly lit.
Unusual number of zombies spawning detecting now in 13w23a and b.
Underground cave-system home (much like Etho's LP on the Ethoslab Youtube channel) had manageable numbers of zombies coming during 13w22a, but now is virtually swarmed with them.
This is not due to social zombies as I have observed during the course of other 1.6 snapshots, these waves of zombies appear with brief pauses, not directly from damage on an existing zombie (usually enough time to make another sword or eat a porkchop, and maybe regenerate some health).
Minutes after loading up my world in 13w23a, my wife and I battled hard, then I burned through 2 stacks of torches lighting additional areas in the cave system while she kept the horde at bay, but to no avail... it's like these zombies can sense us or our villagers from 50-100 blocks away through walls.
I do have a few cured villagers, but none of my doors have blocks exposed to sky on either side in a direct line (cave home). Without 'valid' doors, this can't be a village, and therefore can't be subject to sieges, right? Even if it were a siege, sieges end at some point, don't they?
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Yeah, this is annoying. They can see what seems like hundreds of blocks away.
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The more time I look at this, the more it looks like they're detecting me from way far away within line of sight, and villagers from maybe the same distance without getting line of sight on them.
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Incredibly annoying as it's causing some major update issues, I assume it's from the all tracking/pathing going on. Once night time comes around, I have no choice but to fight zombies all night long or sleep before they come. The lag effectively doubles the night period unless I try to keep the numbers down. The sky will slingshot back and forth. The number spawning seems to be odd too. I've got a screenshot of almost 30 of them swarming my house. That doesn't include the other houses in the village I'm in.
Ignoring them and trying to mine means double the time to break blocks as well. Anything broken immediately reappears, then gets broken after the time it took to break it passes again. During the day, this doesn't happen.
It has made for a rather terrifying feature though. Zombies seem to run now. If they sense a new path, they'll very quickly bolt for it. I broke a gate trying to get at some. They found it and 10-15 were banging at doors in about 2-3 seconds. They just flooded through the hole.
kumasasa
What exactly is the bug here ?
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The bug is that the detection radius for zombies appears to have been errantly set insanely high. They're coming from any distance from any loaded section of the map rather than within a short radius around the player or villagers. In addition, they are not despawning as a result of the high detection. Whether this is actually a bug or feature, it's causing lag nearing the point of unplayability in single player.
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Consolidating to MC-17630.
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My concern is not lag, it's just how broad that radius is... is this truly a new works-as-intended feature that having even one villager in your base means you'll always have every zombie within 100 blocks swarming your front doors?
Villages on Hard difficulty already had a hard enough time surviving a few nights without player intervention, but now they will always fail without player intervention.
I don't think I've been experiencing the lag, but I am seeing that it is a significant issue for many folks – This is not a duplicate of MC-17630. I assert that the detection radius as currently implemented is this bug, unless it really works as intended. I would be fine with WAI, but it is a big change from social zombies in 13w17, and a HUGE change from 1.5. As implemented, it should be the very first 1.6 patch note even before the introduction of horses, unless it's toned down significantly.
kumasasa
Working as intended:
http://www.minecraftwiki.net/wiki/Version_history/Development_versions#13w23b
New zombie mechanics and AI.
Able to lock onto the player from much further away.
Mobbing zombies can now move when further than 32 blocks from player.
Spawn additional zombies when not being looked at.
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Ok. Let's kick some night of the living dead style ass, then.
New Zombie aggro range seems to be beyond their 16 typical range (or 32 if they sense a Village.) Now Zombies can aggro on Players and Villagers from, well, from the tests I did... around 64-80 blocks away. Only difference between Players and Villagers, Zombies can't aggro on Players no matter how far off if they can't see you, but for Villagers they can. This is not a Zombie Siege Event you are experiencing. Those are still broken I believe as MC-7432 has not been fixed.