在浏览器中获取textarea的文本值报错，java.lang.IllegalA?报错

四月 12, 2016 12:59:50 下午 org.apache.coyote.http11.AbstractHttp11Processor process
信息: Error parsing HTTP request header
 Note: further occurrences of HTTP header parsing errors will be logged at DEBUG level.
java.lang.IllegalArgumentException: Request header is too large
at org.apache.coyote.http11.InternalAprInputBuffer.fill(InternalAprInputBuffer.java:576)
at org.apache.coyote.http11.InternalAprInputBuffer.parseRequestLine(InternalAprInputBuffer.java:219)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:993)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2517)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2506)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

at java.lang.Thread.run(Thread.java:745)

页面是使用ajax提交到控制层的，提交的内容是一个敏感词库，大约12kb，在前台修改后提交到服务器进行保存，作为一个TXT文件保存在服务器上，请问大神有什么解决方法？