HTTP Status 400 – Bad Request


Type Exception Report

Message The character [_] is never valid in a domain name.

Description The server cannot or will not process the request due to something that is perceived to be a client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing).

Exception

java.lang.IllegalArgumentException: The character [_] is never valid in a domain name.
	org.apache.tomcat.util.http.parser.HttpParser$DomainParseState.next(HttpParser.java:946)
	org.apache.tomcat.util.http.parser.HttpParser.readHostDomainName(HttpParser.java:842)
	org.apache.tomcat.util.http.parser.Host.parse(Host.java:66)
	org.apache.tomcat.util.http.parser.Host.parse(Host.java:40)
	org.apache.coyote.AbstractProcessor.parseHost(AbstractProcessor.java:293)
	org.apache.coyote.http11.Http11Processor.prepareRequest(Http11Processor.java:1201)
	org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:775)
	org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:808)
	org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498)
	org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	java.lang.Thread.run(Thread.java:748)

Note The full stack trace of the root cause is available in the server logs.


Apache Tomcat/8.5.42