On 07/12/2023 15:37, Ivano Luberti wrote:
Hi, since a few days these errors started showing in my log files:
06-Dec-2023 07:39:56.082 INFO [http-nio-8080-exec-5826]
org.apache.coyote.http11.Http11Processor.service 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:790)
at
org.apache.coyote.http11.Http11InputBuffer.parseHeader(Http11InputBuffer.java:975)
at
org.apache.coyote.http11.Http11InputBuffer.parseHeaders(Http11InputBuffer.java:604)
at
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:294)
at
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1789)
at
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at
org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
at
org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:750)
I know I can increase the tolerated header size using sometjing like this:
<Connector port="8080" maxHttpHeaderSize="65536" protocol="HTTP/1.1" ... />
Bu my question is how can i debug the issue?
For example: how can i find the page requested when the exception was
raised?
Match the timestamp in the logs with the timestamp in the access logs of
the associated 400 response.
Mark
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