[MC-298417] Modifying a wolf's data via commands resets its max health attribute

If you change a wolf's max_health attribute and then modify its data (tested with AngerTime, AngryAt and Health), the max_health attribute will reset to the default value of 8.0f.

Steps:

/tick freeze
/summon minecraft:wolf ~ ~ ~
/attribute @n[type=minecraft:wolf] minecraft:max_health base get
/attribute @n[type=minecraft:wolf] minecraft:max_health base set 1.0
/attribute @n[type=minecraft:wolf] minecraft:max_health base get
/data modify entity @n[type=minecraft:wolf] AngerTime set value 1
/attribute @n[type=minecraft:wolf] minecraft:max_health base get

Environment

Windows 11, JDK 21.0.4, Vanilla Minecraft Client.

Linked issues

relates to 2

MC-278994 Wolves can't be spawned with modified max health attribute Open

MC-156746 Can't change Attribute generic.maxHealth for tamed wolves/dogs Resolved

Attachments

Comments 2

clamlol 2025-05-30T23:01:43Z

Can confirm, but only when modifying AngerTime using commands, making it angry through normal gameplay does not change the attribute. I will update the title and description accordingly.

clamlol 2025-05-30T23:17:05Z

Also this seems to apply to Health and likely other data as well, not just AngerTime and AngryAt.