<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class=""><span style="color: rgb(36, 41, 46); font-family: SFMono-Regular, Consolas, 'Liberation Mono', Menlo, Courier, monospace; white-space: pre; background-color: rgb(255, 255, 255);" class="">hello undertow developers!</span></div><div class=""><span style="color: rgb(36, 41, 46); font-family: SFMono-Regular, Consolas, 'Liberation Mono', Menlo, Courier, monospace; white-space: pre; background-color: rgb(255, 255, 255);" class=""><br class=""></span></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class="">we are trying to disable logging of io exceptions like the comment in UndertowLogger.java suggests:</span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class=""><br class=""></span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class=""> /**</span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class=""> * Logger used for IO exceptions. Generally these should be suppressed, because they are of little interest, and it is easy for an</span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class=""> * attacker to fill up the logs by intentionally causing IO exceptions.</span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class=""> */</span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class=""> UndertowLogger REQUEST_IO_LOGGER = Logger.getMessageLogger(UndertowLogger.class, UndertowLogger.class.getPackage().getName() + ".<a href="http://request.io" class="">request.io</a>");</span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class=""><br class=""></span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class="">so we disable <a href="http://io.undertow.request.io" class="">io.undertow.request.io</a></span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class=""><br class=""></span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class="">but it seems that there are still io exceptions logged as io.undertow.request, i see log entries like this:</span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class="">io.undertow.request 2017-06-08 23:44:14,898 UT005003: IOException reading from channel java.io.IOException: UT000128: Remote peer closed connection before all data could be read</span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class=""><span class="Apple-tab-span" style="white-space:pre"> </span>at io.undertow.conduits.FixedLengthStreamSourceConduit.exitRead(FixedLengthStreamSourceConduit.java:338)</span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class=""><span class="Apple-tab-span" style="white-space:pre"> </span>at io.undertow.conduits.FixedLengthStreamSourceConduit.read(FixedLengthStreamSourceConduit.java:255)</span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class=""><span class="Apple-tab-span" style="white-space:pre"> </span>at org.xnio.conduits.ConduitStreamSourceChannel.read(ConduitStreamSourceChannel.java:127)</span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class=""><span class="Apple-tab-span" style="white-space:pre"> </span>at io.undertow.channels.DetachableStreamSourceChannel.read(DetachableStreamSourceChannel.java:209)</span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class=""><span class="Apple-tab-span" style="white-space:pre"> </span>at io.undertow.server.HttpServerExchange$ReadDispatchChannel.read(HttpServerExchange.java:2287)</span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class=""><span class="Apple-tab-span" style="white-space:pre"> </span>at io.undertow.server.handlers.form.FormEncodedDataDefinition$FormEncodedDataParser.doParse(FormEncodedDataDefinition.java:134)</span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class=""><span class="Apple-tab-span" style="white-space:pre"> </span>at io.undertow.server.handlers.form.FormEncodedDataDefinition$FormEncodedDataParser.handleEvent(FormEncodedDataDefinition.java:115</span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class=""><br class=""></span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class="">to me it seems that the handler for form encoded post data uses the wrong logger for its io exceptions.</span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class=""><br class=""></span></font></div><div class=""><font color="#24292e" face="-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" class=""><span style="font-size: 14px;" class="">best, sascha</span></font></div></body></html>