ErrorPage403.jsp causes stacktrace thrown from Tomcat coyote parsing request headers

[INFO] [talledLocalContainer] INFO [http-nio-8080-exec-9] org.apache.coyote.http11.AbstractHttp11Processor.process Error parsing HTTP request header
[INFO] [talledLocalContainer]  java.lang.IllegalArgumentException: Invalid character found in method name. HTTP method names must be tokens
[INFO] [talledLocalContainer] 	at org.apache.coyote.http11.AbstractNioInputBuffer.parseRequestLine(AbstractNioInputBuffer.java:232)
[INFO] [talledLocalContainer] 	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1013)
[INFO] [talledLocalContainer] 	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:670)
[INFO] [talledLocalContainer] 	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
[INFO] [talledLocalContainer] 	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
[INFO] [talledLocalContainer] 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
[INFO] [talledLocalContainer] 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
[INFO] [talledLocalContainer] 	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
[INFO] [talledLocalContainer] 	at java.lang.Thread.run(Thread.java:745)
[INFO] [talledLocalContainer]