The web project does't contain classes directory on version 2017.3
Answered
Today, I upgrade idea to version 2017.3 . When I build my web project, the target directory does't contain the classes directory, the last version is OK.
My build setting

The build result

It's a bug?
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Check idea.log/build.log for errors: https://intellij-support.jetbrains.com/hc/articles/207241085.
Make sure rebuild produces classes in the output directory and source roots are configured properly.
If the issue persists, please file a bug at https://youtrack.jetbrains.com/issues/IDEA with a sample project to reproduce.
When I reconfigure the project, it's OK. While I clear the artifacts and rebuild it, the classes directory was missing. My colleague also fond it