今早打开服务器，看到tomcat日志里面有如下信息：
11-Jul-2017 07:18:39.953 INFO [http-nio-8080-exec-2] org.apache.coyote.http11.Http11Processor.service 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:422) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:683) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:722)
解决：遇到过几次这个日志，原因是App端访问服务器时，参数错误（不全或类型不对），检查客户端即可发现问题。当然想进一步改进，报该错误也和服务器校验处理相关，服务器可以对传入的数据进行进一步的校验判断。
