Icons sometimes fail after switching gamemode

[MattLavalleeMA]

Occasionally, icons will fail to load after switching gamemodes between creative/survival. I haven't been able to nail down exact repro steps because it often does work fine but sometimes does not.

I suspect this may trace back to JourneyMap itself, as sometimes the minimap also loses the icons.

Stack trace:

09:25:56.345
File at resource location not found: minecraft:squid
09:25:56.347
File at resource location not found: minecraft:fish_tropical_a
09:25:56.348
File at resource location not found: minecraft:fish_pufferfish
09:25:56.354
File at resource location not found: minecraft:fish_tropical_b

09:25:56.348
Uncaught exception
java.lang.NullPointerException: Cannot invoke "java.net.URL.openStream()" because the return value of "java.lang.Class.getResource(String)" is null
	at knot//journeymap_webmap.routes.Resources.getDefaultImage(Resources.java:108)
	at knot//journeymap_webmap.routes.Resources.resourcesGet(Resources.java:67)
	at knot//io.javalin.router.Endpoint.handle(Endpoint.kt:52)
	at knot//io.javalin.router.ParsedEndpoint.handle(ParsedEndpoint.kt:15)
	at knot//io.javalin.http.servlet.DefaultTasks.HTTP$lambda$9$lambda$7$lambda$6(DefaultTasks.kt:52)
	at knot//io.javalin.http.servlet.JavalinServlet.handleTask(JavalinServlet.kt:99)
	at knot//io.javalin.http.servlet.JavalinServlet.handleSync(JavalinServlet.kt:64)
	at knot//io.javalin.http.servlet.JavalinServlet.handle(JavalinServlet.kt:50)
	at knot//io.javalin.http.servlet.JavalinServlet.service(JavalinServlet.kt:30)
	at knot//jakarta.servlet.http.HttpServlet.service(HttpServlet.java:723)
	at knot//org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:764)
	at knot//org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:529)
	at knot//org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221)
	at knot//org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1580)
	at knot//org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221)
	at knot//org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1381)
	at knot//org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:176)
	at knot//org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:484)
	at knot//org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1553)
	at knot//org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174)
	at knot//org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1303)
	at knot//org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:129)
	at knot//org.eclipse.jetty.server.handler.StatisticsHandler.handle(StatisticsHandler.java:173)
	at knot//org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)
	at knot//org.eclipse.jetty.server.Server.handle(Server.java:563)
	at knot//org.eclipse.jetty.server.HttpChannel$RequestDispatchable.dispatch(HttpChannel.java:1598)
	at knot//org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:753)
	at knot//org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:501)
	at knot//org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:287)
	at knot//org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:314)
	at knot//org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100)
	at knot//org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)
	at knot//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:421)
	at knot//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:390)
	at knot//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:277)
	at knot//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.produce(AdaptiveExecutionStrategy.java:193)
	at knot//org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:969)
	at knot//org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1194)
	at knot//org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1149)
	at java.base/java.lang.Thread.run(Thread.java:1583)

Related JourneyMap log entry:

[09:25:29] [JettyServerThreadPool-109/ERROR] [MobIconCache] Could not load Mob icon: java.lang.IllegalStateException: Rendersystem called from wrong thread
	at knot//com.mojang.blaze3d.systems.RenderSystem.constructThreadException(RenderSystem.java:129)
	at knot//com.mojang.blaze3d.systems.RenderSystem.assertOnRenderThread(RenderSystem.java:124)
	at knot//com.mojang.blaze3d.opengl.GlStateManager.clearGlErrors(GlStateManager.java:539)
	at knot//net.minecraft.class_10865.createTexture(class_10865.java:104)
	at knot//net.minecraft.class_10865.createTexture(class_10865.java:94)
	at knot//net.minecraft.class_1043.<init>(class_1043.java:22)
	at knot//journeymap.client.render.draw.MobIconCache.addIcon(MobIconCache.java:256)
	at knot//journeymap.client.render.draw.MobIconCache.ensureMobIconsLoaded(MobIconCache.java:222)
	at knot//journeymap.client.render.draw.MobIconCache.getMobIcon(MobIconCache.java:102)
	at knot//journeymap.client.model.EntityDTO.update(EntityDTO.java:301)
	at knot//journeymap.client.model.EntityHelper.getEntitiesNearby(EntityHelper.java:90)
	at knot//journeymap.client.model.EntityHelper.getAmbientCreaturesNearby(EntityHelper.java:154)
	at knot//journeymap.client.data.AmbientCreatureData.load(AmbientCreatureData.java:27)
	at knot//journeymap.client.data.AmbientCreatureData.load(AmbientCreatureData.java:16)
	at knot//com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3574)
	at knot//com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2316)
	at knot//com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2189)
	at knot//com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2079)
	at knot//com.google.common.cache.LocalCache.get(LocalCache.java:4017)
	at knot//com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4040)
	at knot//com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4989)
	at knot//journeymap.client.data.DataCache.getAmbientCreatures(DataCache.java:303)
	at knot//journeymap_webmap.routes.Data.dataGet(Data.java:50)
	at knot//io.javalin.router.Endpoint.handle(Endpoint.kt:52)
	at knot//io.javalin.router.ParsedEndpoint.handle(ParsedEndpoint.kt:15)
	at knot//io.javalin.http.servlet.DefaultTasks.HTTP$lambda$9$lambda$7$lambda$6(DefaultTasks.kt:52)
	at knot//io.javalin.http.servlet.JavalinServlet.handleTask(JavalinServlet.kt:99)
	at knot//io.javalin.http.servlet.JavalinServlet.handleSync(JavalinServlet.kt:64)
	at knot//io.javalin.http.servlet.JavalinServlet.handle(JavalinServlet.kt:50)
	at knot//io.javalin.http.servlet.JavalinServlet.service(JavalinServlet.kt:30)
	at knot//jakarta.servlet.http.HttpServlet.service(HttpServlet.java:723)
	at knot//org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:764)
	at knot//org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:529)
	at knot//org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221)
	at knot//org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1580)
	at knot//org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221)
	at knot//org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1381)
	at knot//org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:176)
	at knot//org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:484)
	at knot//org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1553)
	at knot//org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174)
	at knot//org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1303)
	at knot//org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:129)
	at knot//org.eclipse.jetty.server.handler.StatisticsHandler.handle(StatisticsHandler.java:173)
	at knot//org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)
	at knot//org.eclipse.jetty.server.Server.handle(Server.java:563)
	at knot//org.eclipse.jetty.server.HttpChannel$RequestDispatchable.dispatch(HttpChannel.java:1598)
	at knot//org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:753)
	at knot//org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:501)
	at knot//org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:287)
	at knot//org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:314)
	at knot//org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100)
	at knot//org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)
	at knot//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:421)
	at knot//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:390)
	at knot//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:277)
	at knot//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.run(AdaptiveExecutionStrategy.java:199)
	at knot//org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:411)
	at knot//org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:969)
	at knot//org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1194)
	at knot//org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1149)
	at java.base/java.lang.Thread.run(Thread.java:1583)

[mysticdrew]

What version of journeymap and webmap mod are you using?

[MattLavalleeMA]

What version of journeymap and webmap mod are you using?

Sorry, realized after-the-fact that I should've included all that. I believe they're latest releases on everything:
journeymap-fabric-1.21.5-6.0.0-beta.44
journeymap-webmap-fabric-1.21.4-1.0.7

• fabric-api-0.121.0+1.21.5

[mysticdrew]

beta.45 and webmap 1.0.8 are the latest.
I tried to replicate your issue and could not, could you please update your versions and see if there is still an issue?

I tried rapidly switching game modes, reloading resource packs multiple times, nothing was causing an issue. Maybe it was fixed in journeymap beta.45 with many of the bug fixes I did.

[MattLavalleeMA]

Just updated all to latest -- will check back tonight with the results. Thanks!

[MattLavalleeMA]

beta.45 and webmap 1.0.8 are the latest. I tried to replicate your issue and could not, could you please update your versions and see if there is still an issue?

I tried rapidly switching game modes, reloading resource packs multiple times, nothing was causing an issue. Maybe it was fixed in journeymap beta.45 with many of the bug fixes I did.

The good news is that it didn't repro by just switching game modes. The bad news is that it did repro when I enabled & disabled the X-Ray Ultimate resource pack.

Minecraft log:

20:39:26.301
File at resource location not found: minecraft:bat
20:39:26.304
Uncaught exception
java.lang.NullPointerException: Cannot invoke "java.net.URL.openStream()" because the return value of "java.lang.Class.getResource(String)" is null
	at knot//journeymap_webmap.routes.Resources.getDefaultImage(Resources.java:108)
	at knot//journeymap_webmap.routes.Resources.resourcesGet(Resources.java:67)
	at knot//io.javalin.router.Endpoint.handle(Endpoint.kt:52)
	at knot//io.javalin.router.ParsedEndpoint.handle(ParsedEndpoint.kt:15)
	at knot//io.javalin.http.servlet.DefaultTasks.HTTP$lambda$9$lambda$7$lambda$6(DefaultTasks.kt:52)
	at knot//io.javalin.http.servlet.JavalinServlet.handleTask(JavalinServlet.kt:99)
	at knot//io.javalin.http.servlet.JavalinServlet.handleSync(JavalinServlet.kt:64)
	at knot//io.javalin.http.servlet.JavalinServlet.handle(JavalinServlet.kt:50)
	at knot//io.javalin.http.servlet.JavalinServlet.service(JavalinServlet.kt:30)
	at knot//jakarta.servlet.http.HttpServlet.service(HttpServlet.java:723)
	at knot//org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:764)
	at knot//org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:529)
	at knot//org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221)
	at knot//org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1580)
	at knot//org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221)
	at knot//org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1381)
	at knot//org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:176)
	at knot//org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:484)
	at knot//org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1553)
	at knot//org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174)
	at knot//org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1303)
	at knot//org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:129)
	at knot//org.eclipse.jetty.server.handler.StatisticsHandler.handle(StatisticsHandler.java:173)
	at knot//org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)
	at knot//org.eclipse.jetty.server.Server.handle(Server.java:563)
	at knot//org.eclipse.jetty.server.HttpChannel$RequestDispatchable.dispatch(HttpChannel.java:1598)
	at knot//org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:753)
	at knot//org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:501)
	at knot//org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:287)
	at knot//org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:314)
	at knot//org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100)
	at knot//org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)
	at knot//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:421)
	at knot//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:390)
	at knot//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:277)
	at knot//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.run(AdaptiveExecutionStrategy.java:199)
	at knot//org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:411)
	at knot//org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:969)
	at knot//org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1194)
	at knot//org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1149)
	at java.base/java.lang.Thread.run(Thread.java:1583)

JM log:

[20:39:23] [Render thread/INFO] [ColorPalette] Color palette file generated for 0 blockstates in 0ms for: Default Palette
[20:39:26] [JettyServerThreadPool-472/ERROR] [MobIconCache] Could not load Mob icon: java.lang.IllegalStateException: Rendersystem called from wrong thread
	at knot//com.mojang.blaze3d.systems.RenderSystem.constructThreadException(RenderSystem.java:129)
	at knot//com.mojang.blaze3d.systems.RenderSystem.assertOnRenderThread(RenderSystem.java:124)
	at knot//com.mojang.blaze3d.opengl.GlStateManager.clearGlErrors(GlStateManager.java:539)
	at knot//net.minecraft.class_10865.createTexture(class_10865.java:104)
	at knot//net.minecraft.class_10865.createTexture(class_10865.java:94)
	at knot//net.minecraft.class_1043.<init>(class_1043.java:22)
	at knot//journeymap.client.render.draw.MobIconCache.addIcon(MobIconCache.java:256)
	at knot//journeymap.client.render.draw.MobIconCache.ensureMobIconsLoaded(MobIconCache.java:222)
	at knot//journeymap.client.render.draw.MobIconCache.getMobIcon(MobIconCache.java:102)
	at knot//journeymap.client.model.entity.EntityDTO.update(EntityDTO.java:300)
	at knot//journeymap.client.model.entity.EntityHelper.getEntitiesNearby(EntityHelper.java:90)
	at knot//journeymap.client.model.entity.EntityHelper.getAmbientCreaturesNearby(EntityHelper.java:154)
	at knot//journeymap.client.data.AmbientCreatureData.load(AmbientCreatureData.java:27)
	at knot//journeymap.client.data.AmbientCreatureData.load(AmbientCreatureData.java:16)
	at knot//com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3574)
	at knot//com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2316)
	at knot//com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2189)
	at knot//com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2079)
	at knot//com.google.common.cache.LocalCache.get(LocalCache.java:4017)
	at knot//com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4040)
	at knot//com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4989)
	at knot//journeymap.client.data.DataCache.getAmbientCreatures(DataCache.java:303)
	at knot//journeymap_webmap.routes.Data.dataGet(Data.java:50)
	at knot//io.javalin.router.Endpoint.handle(Endpoint.kt:52)
	at knot//io.javalin.router.ParsedEndpoint.handle(ParsedEndpoint.kt:15)
	at knot//io.javalin.http.servlet.DefaultTasks.HTTP$lambda$9$lambda$7$lambda$6(DefaultTasks.kt:52)
	at knot//io.javalin.http.servlet.JavalinServlet.handleTask(JavalinServlet.kt:99)
	at knot//io.javalin.http.servlet.JavalinServlet.handleSync(JavalinServlet.kt:64)
	at knot//io.javalin.http.servlet.JavalinServlet.handle(JavalinServlet.kt:50)
	at knot//io.javalin.http.servlet.JavalinServlet.service(JavalinServlet.kt:30)
	at knot//jakarta.servlet.http.HttpServlet.service(HttpServlet.java:723)
	at knot//org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:764)
	at knot//org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:529)
	at knot//org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221)
	at knot//org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1580)
	at knot//org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221)
	at knot//org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1381)
	at knot//org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:176)
	at knot//org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:484)
	at knot//org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1553)
	at knot//org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174)
	at knot//org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1303)
	at knot//org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:129)
	at knot//org.eclipse.jetty.server.handler.StatisticsHandler.handle(StatisticsHandler.java:173)
	at knot//org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)
	at knot//org.eclipse.jetty.server.Server.handle(Server.java:563)
	at knot//org.eclipse.jetty.server.HttpChannel$RequestDispatchable.dispatch(HttpChannel.java:1598)
	at knot//org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:753)
	at knot//org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:501)
	at knot//org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:287)
	at knot//org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:314)
	at knot//org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100)
	at knot//org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)
	at knot//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:421)
	at knot//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:390)
	at knot//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:277)
	at knot//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.run(AdaptiveExecutionStrategy.java:199)
	at knot//org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:411)
	at knot//org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:969)
	at knot//org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1194)
	at knot//org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1149)
	at java.base/java.lang.Thread.run(Thread.java:1583)

Once it happens, all icons are blank and the error is thrown for every mob type. Only solution seems to be to restart Minecraft.

[MattLavalleeMA]

Turns out I've also been able to reproduce this simply by changing Shader settings multiple times.