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INFO: 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.InternalInputBuffer.fill(InternalInputBuffer.java:512) at org.apache.coyote.http11.InternalInputBuffer.fill(InternalInputBuffer.java:501) at org.apache.coyote.http11.InternalInputBuffer.parseRequestLine(InternalInputBuffer.java:171) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:996) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:623) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:722 How could I solve this in my spring web application?
I had gone through this thread Request header is too large
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The “Bad Request – Request Too Long” error is exclusive to browsers. The typical solution is to clear the cache and cookies in your browser.
The “Bad Request – Request Too Long” error is exclusive to Chrome. Typically the solution is to clear the cache and cookies in your Chrome browser, making sure to completely close all browser windows and tabs after doing so.
The HTTP 431 Request Header Fields Too Large response status code indicates that the server refuses to process the request because the request's HTTP headers are too long. The request may be resubmitted after reducing the size of the request headers.
go to the network tab and right click the first item and click copy as cURL (this is how you will get the header size. Then go to terminal and do your curl command curl ... -w '%{size_request} %{size_upload}' which will print out the request size at the end.
here is the question, is there any limit in HTTP headers? The Answer is No. there is no limit but web-servers are limiting their incoming request header size even in POST requests therefore we getting 413 (Request header is too large). This limitation is including request line and header fields.
http://httpd.apache.org/docs/2.2/mod/core.html#limitrequestfieldsize
https://tomcat.apache.org/tomcat-5.5-doc/config/http.html
http://nginx.org/en/docs/http/ngx_http_core_module.html#large_client_header_buffers
Maximum on http header values?
In my case, I had SpringBoot 1.5.8 and used HTTP POST, however I had to add:
server.max-http-header-size=10000000 in application.properties.
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Solved! I was using HTTP GET instead of HTTP POST. Technically I have seen HttpGet will have issue if the URL length goes beyond 2000 characters. In that case, it's better to use HttpPost or split the URL. Browsers have limits ranging on the 2kb - 8kb
Tomcat: Request header Too large
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