when spring boot startup,throw out the "method names must be tokens" exception

Question

When Spring Boot starts up, it throws the method names must be tokens exception

2016-08-11 16:53:54.499  INFO 14212 --- [0.1-8888-exec-1] o.apache.coyote.http11.Http11Processor   : Error parsing HTTP request header
 Note: further occurrences of HTTP header parsing errors will be logged at DEBUG level.

java.lang.IllegalArgumentException: Invalid character found in method name. HTTP method names must be tokens
        at org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:462) ~[tomcat-embed-core-8.5.4.jar!/:8.5.4]
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:994) ~[tomcat-embed-core-8.5.4.jar!/:8.5.4]
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.4.jar!/:8.5.4]
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:785) [tomcat-embed-core-8.5.4.jar!/:8.5.4]
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1425) [tomcat-embed-core-8.5.4.jar!/:8.5.4]
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.4.jar!/:8.5.4]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_72]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_72]
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.4.jar!/:8.5.4]
        at java.lang.Thread.run(Thread.java:745) [na:1.8.0_72]

2016-08-11 16:53:58.885  INFO 14212 --- [0.1-8888-exec-2] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring FrameworkServlet 'dispatcherServlet'
2016-08-11 16:53:58.888  INFO 14212 --- [0.1-8888-exec-2] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization started
2016-08-11 16:53:58.922  INFO 14212 --- [0.1-8888-exec-2] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization completed in 30 ms
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Anyone knows why it throws this exception?

Answer 1

This exception can occur when you try to execute https request from client on endpoint which isn't https enabled. Client will encrypt request data when server is expecting raw data.

Change https:// to http:// in your client url.

Answer 2

Another Case: SpringBoot and Tomcat use port 8080 or 8888 by default. I had a Jupyter Notebook running at the same time which has a token in it's url path and some random characters. Anyway: The Notebook was still trying to make requests when the jupyter notebook server was down.

If you encounter this error: Check if you have another Application running that is either spawning a webserver or talking to a webserver on such ports.

Answer 3

The same problem.

cmd -> netstat -ano then find the port your have used(e.g 8888)

I find a process try send package not Http request to my 8888 port, so the tomcat throw the method names must be tokens Exception.

you can:

• change server port;

• find the process and kill it;

Answer 4

In my case it was when Tomcat created HTTPS request without SSL certificate installed on it. To fix it I changed schema in request to HTTP. Or you should create SSL certificate to use HTTPS.