Connection abort / reset

ai.classifai.MainVerticle - Classifai started successfully
ai.classifai.MainVerticle - Go on and open http://localhost:9999
ai.classifai.server.ServerVerticle - Loading project: test123456
java.io.IOException: An established connection was aborted by the software in your host machine
at sun.nio.ch.SocketDispatcher.read0(Native Method)
at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43)
at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
at sun.nio.ch.IOUtil.read(IOUtil.java:192)
at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:377)
at io.netty.buffer.PooledByteBuf.setBytes(PooledByteBuf.java:253)
at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1133)
at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:350)
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:148)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.lang.Thread.run(Thread.java:748)
ai.classifai.server.ServerVerticle - Loading project: test123456

Start with ai.classifai.MainVerticle and ai.classifai.server.ServerVerticle, then reproduce loading project test123456 at the displayed localhost URL. Trace the connection-abort path around the reported Java and io.netty stack frames; done means the project loads without this unhandled connection-reset error or its expected handling is documented by a regression test.

Written by the indexing model from the issue text.