Skin texture is released too early

[Water-Moon]

When the client is forcefully disconnected from the server (e.g. connection issue), this mod will attempt to release the skin textures before the client is actually disconnected. As a result, the player skin will become a missing texture right before the client actually disconnect, and this problem will persist until client restart.

From the log, it is easy to see that the client attempted to load the skin right after it is deleted, and then threw a FileNotFoundException

Related log

> [11:53:49] [Netty Client IO #9/INFO]: Client disconnected from server > [11:53:49] [Netty Client IO #9/INFO]: Cleaning client cache... > [11:53:49] [Netty Client IO #9/INFO]: Cleared cached client data! Disconnected from server. > [11:53:49] [Client thread/INFO]: Released 2 skin textures > [11:53:49] [Client thread/WARN]: Failed to load texture: minecraft:skins/db9a*** > java.io.FileNotFoundException: minecraft:skins/db9a*** > at net.minecraft.client.resources.FallbackResourceManager.getResource(FallbackResourceManager.java:69) ~[cei.class:?] > at net.minecraft.client.resources.SimpleReloadableResourceManager.getResource(SimpleReloadableResourceManager.java:65) ~[cev.class:?] > at net.minecraft.client.renderer.texture.SimpleTexture.loadTexture(SimpleTexture.java:40) ~[cdm.class:?] > at net.minecraft.client.renderer.texture.TextureManager.loadTexture(TextureManager.java:101) [cdr.class:?] > at net.minecraft.client.renderer.texture.TextureManager.bindTexture(TextureManager.java:67) [cdr.class:?] > at net.minecraft.client.renderer.ItemRenderer.renderArmFirstPerson(ItemRenderer.java:264) [buu.class:?] > at net.minecraft.client.renderer.ItemRenderer.renderItemInFirstPerson(ItemRenderer.java:394) [buu.class:?] > at net.minecraft.client.renderer.ItemRenderer.renderItemInFirstPerson(ItemRenderer.java:359) [buu.class:?] > at net.minecraft.client.renderer.EntityRenderer.renderHand(EntityRenderer.java:1063) [buq.class:?] > at net.minecraft.client.renderer.EntityRenderer.renderHand(EntityRenderer.java:1007) [buq.class:?] > at net.minecraft.client.renderer.EntityRenderer.renderWorldPass(EntityRenderer.java:1981) [buq.class:?] > at net.minecraft.client.renderer.EntityRenderer.renderWorld(EntityRenderer.java:1621) [buq.class:?] > at net.minecraft.client.renderer.EntityRenderer.updateCameraAndRender(EntityRenderer.java:1390) [buq.class:?] > at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1119) [bib.class:?] > at net.minecraft.client.Minecraft.run(Minecraft.java:3614) [bib.class:?] > at net.minecraft.client.main.Main.main(SourceFile:123) [Main.class:?] > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_311] > at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_311] > at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_311] > at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_311] > at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?] > at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]

Some additional information:

• It seems that once a FileNotFoundException is thrown Minecraft will not attempt to load that texture again, so a broken texture stay fully broken until resource reload (or game restart? unsure...).

• Also, when a client is disconnected due to connection issue (for example, common ones like "remote host forcefully closed a connection"), it seems like the world will be rendered a few more frames before the client actually shows the disconnected screen. However, the ClientDisconnectionFromServerEvent seems to fire earlier than that screen.

These two adds together means that the /client/mcfixes/SkinDataReleaser in this mod will attempt to get rid of the skin textures while they might be still in use for another few frames, causing the error to be thrown. And once the error occur, there is no turning back.

This theory can be confirmed that a skin will only be broken for the current play session if it is actively rendered at the last few frames, which means being visible as:

• a block or item on screen (e.g. skull)
• the head icons in the tab menu, or a menu in some other mods
• an empty hand when in first person mode (which is the one occurred in the above log)
• other players in front of you
• your own model, when in 3rd person mode

Therefore, although I don't understand too much about texture related code, I may suggest two ways of fixing it. The first one is to delay the release of the skin (maybe make a timer on separate thread?). The second is to find and patch the renders that need skin textures.

[KasumiNova]

Same issue

[Rongmario]

Thanks for the investigation, haven't had time to check it out for myself. Fix coming up in next version; closing #114 in favour of this one.

[Rongmario]

Fixed in dev, now released as the world is about to set to null, on the same frame.