This repository reproduces an issue in DefaultHandlerExceptionResolver#handleHttpMessageNotReadable method occurring in Spring Framework 6.1.3 when using Tomcat >= 10.1.16 (e.g. Spring Boot >= 3.1.6).

It serves a single POST endpoint /hello (in WebController), and uses the load-time AspectJ weaving to throw an IOException from org.apache.coyote.Request.doRead method.

Steps to reproduce:

1. Observe the Tomcat version override set to 10.1.15 in the dependencyManagement section of build.gradle, and run ./gradlew test.
2. Observe the test success and no exception, and a (expected) warning:

DefaultHandlerExceptionResolver : Resolved [org.springframework.http.converter.HttpMessageNotReadableException: I/O error while reading input message]

3. Comment out the dependencyManagement section to bring Tomcat 10.1.18, and run ./gradlew test (it's also reproducible for Tomcat >= 10.1.16).
4. Observe the test failure and the exception:

DefaultHandlerExceptionResolver : Failure while trying to resolve exception [org.springframework.http.converter.HttpMessageNotReadableException]

    java.lang.IllegalStateException: Cannot call sendError() after the response has been committed