Looking at https://tomcat.apache.org/tomcat-9.0-doc/config/http.html I see that 8KB is the default limit of Header Size in Tomcat Apache.
The log shows the following when I make a request with headers more than the default 8KB:
Dec 30, 2019 1:59:26 PM org.apache.coyote.http11.Http11Processor service
INFO: Error parsing HTTP request header
Note: further occurrences of HTTP request parsing errors will be logged at DEBUG level.
java.lang.IllegalArgumentException: Request header is too large
at org.apache.coyote.http11.Http11InputBuffer.fill(Http11InputBuffer.java:720)
at org.apache.coyote.http11.Http11InputBuffer.parseHeader(Http11InputBuffer.java:867)
at org.apache.coyote.http11.Http11InputBuffer.parseHeaders(Http11InputBuffer.java:563)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:311)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:836)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1839)
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)
My Java Project does not have a server.xml inside /webapp/WEB-INF, just the web.xml. I tried to create a server.xml and add the following like said in this thread:
<?xml version='1.0' encoding='utf-8'?>
<Connector port="8080" protocol="HTTP/1.1" maxHttpHeaderSize="65536" maxPostSize="4194304"
URIEncoding="UTF-8"/>//webapp/WEB-INF
How Can I increase the default size limit? I'd like to set 16KB.
Thanks in advance =)
PS: I am new in Tomcat/Java World, so sorry if I made a horrible mistake =p
Looking at API doc seems that this one
Tomcat t = new Tomcat();
t.getConnector().setAttribute("maxHttpHeaderSize",65536);
could be a valid solution.