关于SpringBoot应用挂了很久之后，会发生Invalid character found in method name. HTTP method names must be tokens的问题。
java.lang.IllegalArgumentException: Invalid character found in method name. HTTP method names must be tokens
at org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:426) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:687) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459) [tomcat-embed-core-8.5.29.jar:8.5.29]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.29.jar:8.5.29]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135) [na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) [na:na]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.29.jar:8.5.29]
at java.base/java.lang.Thread.run(Thread.java:844) [na:na]
网上方案 据说是tomcat 的设置问题，如果出现相关情况，可以设置一下application.yml。还有的说是https问题。
server:
tomcat:
uri-encoding: UTF-8
max-http-header-size: 8096
server: port: 5555 servlet: context-path: /xxxx tomcat: remote-ip-header: x-forward-for uri-encoding: UTF-8 max-threads: 1000 max-http-header-size: 8096--------------------- 作者：Moshow郑锴 来源：CSDN 原文：https://blog.csdn.net/moshowgame/article/details/82597326 版权声明：本文为博主原创文章，转载请附上博文链接！
SpringBoot：Invalid character found in method name. HTTP method names must be tokens
原文：https://www.cnblogs.com/chancy/p/10782289.html