I\'ve tried to have a controller in Spring return a JSON response to no avail using the Jackson classes as recommended with 3.0. I\'ve got the jackson jar files(jackson-core
I know that this is an old thread, but maybe someone will encounter the same problem as me. I got that exception when migrating an application from Spring 4.0.3.RELEASE to Spring 4.1.0.RELEASE. In my case updating Jackson from 1.9.x to 2.4.x did the trick.