JSP compiler cannot find transitive dependency

• Type: Bug
• Status: Verified
• Resolution: Unresolved
• Affects Version/s: 7.0.X EE, 7.0.X, Master
• Fix Version/s: None
• Component/s: Core Infrastructure, Core Infrastructure > Servlet JSP Compiler
• Labels:
  • QA-V
• Story Points: 8
• Fix Priority: 2

Steps to reproduce:

Lets say we have the following project structure:

      bundle-1
            com.base  
                  interface Foo

      bundle-2
            com.api
                  interface Bar extends Foo

      bundle-3
            com.impl
                  class FooBar implements Bar

Bundle-2 has provided dependency on bundle-1 and bundle-3 has provided dependency on bundle-1/2. We want to use FooBar in our MVCPortlet bundle (bundle-4). For the sake of this example export packages in bundle-1/2/3 which should make Foo/Bar/FooBar visible to other bundles, and add bundle-1/2/3 as provided dependencies to build.gradle of bundle-4.

Use FooBar class in .java and.jsp code ( e.g. Bar bar = new FooBar(); bar.get(); )

Expected Results:
Everything compiles and runs fine in .java and .jsp code.

Actual Results:
.java code compiles and runs fine, .jsp throws the following error in runtime:

org.apache.jasper.JasperException: PWC6033: Error in Javac compilation for JSP__PWC6197: An error occurred at line: 11 in the jsp file: /view.jsp_PWC6199: Generated servlet error:_cannot access Foo, class file Foo not found..... (full log attached)

Explicitly adding unused import for Foo "solves" the problem. as Raymond Auge explained: "The problem is likely that the jsp introspection isn't deep enough, since it only looks at source and not bytecode."