Note: further occurrences of HTTP header parsing errors will be logged at DEBUG level

2018-03-23 18:32:21,690 [INFO] [http-nio-11007-exec-2] org.apache.coyote.http11.Http11Processor [DirectJDKLog.java : 181] 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:426)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:687)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459)
    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:745)

原因：

产生这个问题的原因是页面表单提交了大量的数据，而这些数据量可能超过了Tomcat 定义的Header头内容，那么很好解决了，只要设置一下Tomcat的maxHttpHeaderSize

解决方案：

　　由于采用的是springboot 内置的tomcat

server:
  port: 9090
  maxHttpHeaderSize: 10240000
  maxHttpPostSize: 10240000
  tomcat:
    maxHttpHeaderSize: 10240000
    maxHttpPostSize: 10240000

扩展： springboot tomcat的配置选项大全

server. Port = xxxx

server. Address =

server. contextPath =

server. displayName =

server. servletPath =

server. contextParameters =

server. useForwardHeaders =

server. serverHeader =

server. maxHttpHeaderSize =

server. maxHttpPostSize =

server. connectionTimeout =

server. session.timeout =

server. session.trackingModes =

server. session.persistent =

server.session.storeDir =

server.cookie. name =

server.cookie. domain =

server.cookie. path =

server.cookie. comment =

server.cookie. httpOnly =

server.cookie. secure =

server.cookie. maxAge =

server. ssl. Enabled =

server.ssl. clientAuth =

server.ssl. ciphers =

server.ssl. enabledProtocols =

server.ssl. keyAlias =

server.ssl. keyPassword =

server.ssl. keyStore =

server.ssl. keyStorePassword =

server.ssl. keyStoreType =

server.ssl. keyStoreProvider =

server.ssl. trustStore =

server.ssl. trustStorePassword =

server.ssl. trustStoreType =

server.ssl. trustStoreProvider =

server.ssl. protocol =

server.compression. enabled =

server.compression.mimeTypes =

server.compression.excludedUserAgents =

server.compression.minResponseSize =

server. jspServlet. className =

server.jspServlet. initParameters =

server.jspServlet.registered =

server.tomcat.accesslog.enabled =

server.tomcat.accesslog.pattern =

server.tomcat.accesslog.directory =

server.tomcat.accesslog.prefix =

server.tomcat.accesslog.suffix =

server.tomcat.accesslog.rotate =

server.tomcat.accesslog.renameOnRotate =

server.tomcat.accesslog.requestAttributesEnabled=

server.tomcat.accesslog.buffered =

server.tomcat.internalProxies =

server.tomcat.protocolHeader =

server.tomcat.protocolHeaderHttpsValue =

server.tomcat.portHeader =

server.tomcat.remoteIpHeader=

server.tomcat.basedir =

server.tomcat.backgroundProcessorDelay =

server.tomcat.maxThreads =

server.tomcat.minSpareThreads =

server.tomcat.maxHttpPostSize =

server.tomcat.maxHttpHeaderSize =

server.tomcat.redirectContextRoot =

server.tomcat.uriEncoding =

server.tomcat.maxConnections =

server.tomcat.acceptCount =

server.tomcat.additionalTldSkipPatterns =