Logs flooded with "Failed to read BufferedImage from InputStream" exceptions

Enonic version: 6.15.3
OS: Manjaro Linux 18

I have almost 24 000 lines in my Enonic log from the past month, most of them are this error repeated over and over:

Logged exception
2018-11-14 12:56:13,451 ERROR c.e.x.j.i.e.JsonExceptionMapper - Failed to read BufferedImage from InputStream
java.lang.RuntimeException: Failed to read BufferedImage from InputStream
	at com.enonic.xp.util.Exceptions.newRuntime(Exceptions.java:33)
	at com.enonic.xp.image.ImageHelper.toBufferedImage(ImageHelper.java:58)
	at com.enonic.xp.core.impl.image.ImageServiceImpl.retrieveBufferedImage(ImageServiceImpl.java:233)
	at com.enonic.xp.core.impl.image.ImageServiceImpl.readBufferedImage(ImageServiceImpl.java:185)
	at com.enonic.xp.core.impl.image.ImageServiceImpl.createImage(ImageServiceImpl.java:71)
	at com.enonic.xp.core.impl.image.ImageServiceImpl.lambda$readImage$0(ImageServiceImpl.java:56)
	at com.enonic.xp.core.impl.image.ImmutableFilesHelper.computeIfAbsent(ImmutableFilesHelper.java:47)
	at com.enonic.xp.core.impl.image.ImageServiceImpl.readImage(ImageServiceImpl.java:56)
	at com.enonic.xp.admin.impl.rest.resource.content.ContentIconResource.resolveResponse(ContentIconResource.java:163)
	at com.enonic.xp.admin.impl.rest.resource.content.ContentIconResource.resolveResponseFromImageAttachment(ContentIconResource.java:133)
	at com.enonic.xp.admin.impl.rest.resource.content.ContentIconResource.getContentIcon(ContentIconResource.java:85)
	at sun.reflect.GeneratedMethodAccessor174.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:137)
	at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:296)
	at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:250)
	at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:237)
	at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:356)
	at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:179)
	at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:220)
	at com.enonic.xp.jaxrs.impl.JaxRsServlet.service(JaxRsServlet.java:46)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at com.enonic.xp.web.impl.dispatch.mapping.ServletDefinitionImpl.service(ServletDefinitionImpl.java:39)
	at com.enonic.xp.web.impl.dispatch.pipeline.ServletPipelineImpl.service(ServletPipelineImpl.java:30)
	at com.enonic.xp.web.impl.dispatch.pipeline.FilterChainImpl.doFilter(FilterChainImpl.java:45)
	at com.enonic.xp.web.impl.dispatch.pipeline.FilterChainImpl.doFilter(FilterChainImpl.java:36)
	at com.enonic.xp.portal.impl.auth.AuthFilter.doHandle(AuthFilter.java:45)
	at com.enonic.xp.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:31)
	at com.enonic.xp.web.filter.BaseWebFilter.doFilter(BaseWebFilter.java:33)
	at com.enonic.xp.web.impl.dispatch.mapping.FilterDefinitionImpl.doFilter(FilterDefinitionImpl.java:40)
	at com.enonic.xp.web.impl.dispatch.pipeline.FilterChainImpl.doFilter(FilterChainImpl.java:50)
	at com.enonic.xp.web.impl.dispatch.pipeline.FilterChainImpl.doFilter(FilterChainImpl.java:36)
	at com.enonic.xp.web.impl.auth.BasicAuthFilter.doHandle(BasicAuthFilter.java:33)
	at com.enonic.xp.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:31)
	at com.enonic.xp.web.filter.BaseWebFilter.doFilter(BaseWebFilter.java:33)
	at com.enonic.xp.web.impl.dispatch.mapping.FilterDefinitionImpl.doFilter(FilterDefinitionImpl.java:40)
	at com.enonic.xp.web.impl.dispatch.pipeline.FilterChainImpl.doFilter(FilterChainImpl.java:50)
	at com.enonic.xp.web.impl.dispatch.pipeline.FilterChainImpl.doFilter(FilterChainImpl.java:36)
	at com.enonic.xp.web.impl.context.ContextFilter.lambda$doHandle$0(ContextFilter.java:33)
	at com.enonic.xp.context.ContextImpl.callWith(ContextImpl.java:101)
	at com.enonic.xp.web.impl.context.ContextFilter.doHandle(ContextFilter.java:32)
	at com.enonic.xp.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:31)
	at com.enonic.xp.web.filter.BaseWebFilter.doFilter(BaseWebFilter.java:33)
	at com.enonic.xp.web.impl.dispatch.mapping.FilterDefinitionImpl.doFilter(FilterDefinitionImpl.java:40)
	at com.enonic.xp.web.impl.dispatch.pipeline.FilterChainImpl.doFilter(FilterChainImpl.java:50)
	at com.enonic.xp.web.impl.dispatch.pipeline.FilterChainImpl.doFilter(FilterChainImpl.java:36)
	at com.enonic.xp.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:26)
	at com.enonic.xp.web.filter.BaseWebFilter.doFilter(BaseWebFilter.java:33)
	at com.enonic.xp.web.impl.dispatch.mapping.FilterDefinitionImpl.doFilter(FilterDefinitionImpl.java:40)
	at com.enonic.xp.web.impl.dispatch.pipeline.FilterChainImpl.doFilter(FilterChainImpl.java:50)
	at com.enonic.xp.web.impl.dispatch.pipeline.FilterChainImpl.doFilter(FilterChainImpl.java:36)
	at com.enonic.xp.web.impl.dos.DosFilterWrapper.doFilter(DosFilterWrapper.java:64)
	at com.enonic.xp.web.impl.dispatch.mapping.FilterDefinitionImpl.doFilter(FilterDefinitionImpl.java:40)
	at com.enonic.xp.web.impl.dispatch.pipeline.FilterChainImpl.doFilter(FilterChainImpl.java:50)
	at com.enonic.xp.web.impl.dispatch.pipeline.FilterChainImpl.doFilter(FilterChainImpl.java:36)
	at com.enonic.xp.web.impl.dispatch.pipeline.FilterPipelineImpl.filter(FilterPipelineImpl.java:29)
	at com.enonic.xp.web.impl.dispatch.DispatchServletImpl.service(DispatchServletImpl.java:35)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:860)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:535)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:420)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:190)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1253)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:168)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:166)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1155)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:203)
	at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:73)
	at com.enonic.xp.web.vhost.impl.VirtualHostFilter.doHandle(VirtualHostFilter.java:50)
	at com.enonic.xp.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:31)
	at com.enonic.xp.web.filter.BaseWebFilter.doFilter(BaseWebFilter.java:33)
	at com.enonic.xp.web.impl.dispatch.mapping.FilterDefinitionImpl.doFilter(FilterDefinitionImpl.java:40)
	at com.enonic.xp.web.impl.dispatch.pipeline.FilterChainImpl.doFilter(FilterChainImpl.java:50)
	at com.enonic.xp.web.impl.dispatch.pipeline.FilterChainImpl.doFilter(FilterChainImpl.java:36)
	at com.enonic.xp.web.impl.dos.DosFilterWrapper.doFilter(DosFilterWrapper.java:64)
	at com.enonic.xp.web.impl.dispatch.mapping.FilterDefinitionImpl.doFilter(FilterDefinitionImpl.java:40)
	at com.enonic.xp.web.impl.dispatch.pipeline.FilterChainImpl.doFilter(FilterChainImpl.java:50)
	at com.enonic.xp.web.impl.dispatch.pipeline.FilterChainImpl.doFilter(FilterChainImpl.java:36)
	at com.enonic.xp.web.impl.dispatch.pipeline.FilterPipelineImpl.filter(FilterPipelineImpl.java:29)
	at com.enonic.xp.web.impl.dispatch.DispatchServletImpl.service(DispatchServletImpl.java:35)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:860)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:535)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:527)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:190)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1253)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:168)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:166)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1155)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at com.codahale.metrics.jetty9.InstrumentedHandler.handle(InstrumentedHandler.java:240)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.Server.handle(Server.java:530)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:347)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:256)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102)
	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:247)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:140)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
	at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:382)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:708)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626)
	at java.lang.Thread.run(Thread.java:748)
Caused by: javax.imageio.IIOException: Unsupported Image Type
	at com.sun.imageio.plugins.jpeg.JPEGImageReader.readInternal(JPEGImageReader.java:1079)
	at com.sun.imageio.plugins.jpeg.JPEGImageReader.read(JPEGImageReader.java:1050)
	at javax.imageio.ImageIO.read(ImageIO.java:1448)
	at javax.imageio.ImageIO.read(ImageIO.java:1352)
	at com.enonic.xp.image.ImageHelper.toBufferedImage(ImageHelper.java:54)
	... 118 common frames omitted

Does this mean that the user of this Enonic instance has uploaded a corrupt image? Or can it mean that something went wrong while caching a thumbnail, causing a thumbnail to become corrupt? The error doesn’t contain any paths or other useful information to track down the problem, so I’m pretty stuck.

Somebody probably uploaded an image that isn’t actually an image (or corrupt)

If you have access logs on your webserver you can find out from there what requst is causing this?