post数据过大时候java后台报错

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 Note: further occurrences of HTTP header parsing errors will be logged at DEBUG level. java.lang.IllegalArgumentException: Request header is too large

在tomcat配置中修改或者增加该配置即可。maxPostSize="0"表示无限制。

<Connector connectionTimeout="20000" port="8086" protocol="HTTP/1.1" redirectPort="8443" maxPostSize="0" maxHttpHeaderSize ="10240000"/>