Ignore certain exception logging for UI server.

src/core/webui/server/UIServer.java

@@ -11,7 +11,6 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
-import org.apache.http.ExceptionLogger;
 import org.apache.http.impl.nio.bootstrap.HttpServer;
 import org.apache.http.impl.nio.bootstrap.ServerBootstrap;
 import org.apache.http.impl.nio.reactor.IOReactorConfig;
@@ -320,7 +319,7 @@ protected void start() throws IOException {
                 .setIOReactorConfig(IOReactorConfig.custom().setSoReuseAddress(true).build())
                 .setListenerPort(port)
                 .setServerInfo("Repeat")
-				.setExceptionLogger(ExceptionLogger.STD_ERR)
+				.setExceptionLogger(new UIServerExceptionLogger())
 				.registerHandler("/test", new UpAndRunningHandler())
 				.registerHandler("/static/*", new StaticFileServingHandler());
 		for (Entry<String, HttpHandlerWithBackend> entry : handlers.entrySet()) {

src/core/webui/server/UIServerExceptionLogger.java

@@ -0,0 +1,21 @@
+package core.webui.server;
+
+import java.io.IOException;
+
+import org.apache.http.ExceptionLogger;
+
+/**
+ * Logger that ignores certain commonly encountered (but harmless) exceptions.
+ */
+public class UIServerExceptionLogger implements ExceptionLogger {
+	@Override
+	public void log(Exception arg0) {
+		if (arg0 instanceof IOException) {
+			if (arg0.getLocalizedMessage().contains("An established connection was aborted by the software in your host machine")) {
+				return;
+			}
+		}
+
+		arg0.printStackTrace();
+	}
+}