ava.lang.IllegalArgumentException: Request header is too large

at org.apache.coyote.http11.Http11InputBuffer.fill(Http11InputBuffer.java:722)

at org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:401)

at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:260)

at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)

at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1639)

at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

at java.lang.Thread.run(Thread.java:748)

解决：

server：

 max-http-header-size: 20971520