Validation Error of Spring Beans Schema inside Application Context

Maybe you had an error which is no more there, but the error message is displayed from a cache. This error may have appeared because you had a mix of 2.5 xsd and 3.0 xsd in your applicationContext.xml. You should be able to get details about this error by right-clicking on it (not especially explicit details though...).

Try to clean the error message and re-validate with this minimal file anyway.

In MyEclipseBlue, go to Preferences->My Eclipse->Internet Tools->Cache and remove the files

In Eclipse/STS go to Preferences -> General -> Network Connections and remove the offending files.