Missing soundEvent: minecraft:damage.thorns

There is no sound event called damage.thorns, nor is there even an event called damage. You can check the wiki before reporting a missing sound: http://minecraft.gamepedia.com/Sounds.json

Apparently you are wrong, otherwise minecraft wouldn't be trying to play it and complaining that it can't.

Minecraft is trying to play it because you are imputing the command to play the sound. It's complaining that it can't because there is no sound.

There is no sound event damage.something. Here is the list of sound events: http://minecraft.gamepedia.com/Sounds.json

@Kumasasa, I know that this is unrelated to the bug report, but is there anyway you can keep an eye on MC-54921? The reporter is claiming that all .ogg sounds are "missing" from the game, but I think they aren't even mean't to be playable anyway.

Umm, no. I input no command of any kind whatsoever. I was just playing the game normally and got this error. I hadn't noticed it before so maybe they just added it in this last snapshot and forgot the sound file and to update the docs.

Please reopen this bug.

@Phillip Susi, this report will most likely not be reopened due to the fact that there isn't even a sound named that. The full list of sounds can be seen by clicking on the link in Kumasasa's comment.

Whether or not you think it exists is irrelevant: minecraft thinks it should, and NOT due to anything I have done ( no commands, no mod packs, no nothing ).

How can it not be due to anything that you have done? You didn't even attach the entire log!

How can it be due to anything I have done, when I have done nothing? You assumed that I gave some sort of manual command to play this sound, when I did no such thing, and do not even know what command that would be. There was nothing else of interest in the logs besides the usual loading/saving, and errors about missing mob.witch.idle, which is reported already in another bug.

Reopened & confirmed.

Confirmed for 1.8. Also happens when you melee a Guardian with its spikes extended.

Affects 15w33b.

Confirmed affects 15w33c

Confirmed when fighting enderman with thorns armour in 37a.

Fixed in 15w50a