Notebook hangs when a static method signature is redefined #64

Author: stariy95

RELEASE-NOTES.md

@@ -5,6 +5,7 @@
 - #55 Working on POM in SNAPSHOT mode fails to work properly due to .ivy2 cache 
 - #57 Black error message in dark mode (e.g. VSCode) not easily readable
 - #59 BaseKernel.eval(..) should not declare a checked exception
+- #64 Notebook hangs when a static method signature is redefined
 
 ## 1.0-a4
 

jjava/src/main/java/org/dflib/jjava/execution/JJavaLoaderDelegate.java

@@ -105,7 +105,13 @@ protected Class<?> findClass(String name) throws ClassNotFoundException {
             if (data == null) {
                 return super.findClass(name);
             }
-            return super.defineClass(name, data, 0, data.length, (CodeSource) null);
+            try {
+                return super.defineClass(name, data, 0, data.length, (CodeSource) null);
+            } catch (LinkageError er) {
+                // rethrow as ClassNotFoundException to let the caller properly handle this case
+                // this error could be thrown in some cases (like static method signature change)
+                throw new ClassNotFoundException(name, er);
+            }
         }
     }
 }