原创
Tomcat 报错崩溃：invalid character found in method name
## 现象
## 原因1: ssl证书到期了
## 原因2: Tomcat的header缓冲区大小不够
[详见：解决 Invalid character found in method name. HTTP method names must be tokens - 流水殇 - 博客园](https://www.cnblogs.com/yuananyun/p/6501324.html "详见：解决 Invalid character found in method name. HTTP method names must be tokens - 流水殇 - 博客园")
## 原因3: 修改端口号
[参考: 解决 Invalid character found in method name. HTTP method names must be tokens 异常信息 - 简书r](https://www.jianshu.com/p/5577ae4615d8 "参考: 解决 Invalid character found in method name. HTTP method names must be tokens 异常信息 - 简书")
## 大概率是原因2
Tomcat的header缓冲区大小不够,只需要在server.xml中增加maxHttpHeaderSize字段即可:
```bash
<Connector URIEncoding="UTF-8" port="8080" protocol="org.apache.coyote.http11.Http11NioProtocol"
useBodyEncodingForURI="false"
enableLookups="false"
connectionTimeout="20000"
redirectPort="8443" maxHttpHeaderSize="你想要的大小"/>
如：
<Connector port="8080" executor="tomcatThreadPool"
protocol="HTTP/1.1"
maxThreads="1000"
maxHttpHeaderSize="8192"
minSpareThreads="100"
maxSpareThreads="200"
acceptCount="1000"
maxConnections="1000"
connectionTimeout="30000"
keepAliveTimeout="15000"
maxKeepAliveRequests="1"
tcpNoDelay="true"
redirectPort="8443"
enableLookups="false"
URIEncoding="UTF-8"/>
```
tomcat
云服务器
web