Improve error message when a component is trying to set its id.

1 files changed, 3 insertions, 1 deletions

diff --git a/container-di/src/main/scala/com/yahoo/container/di/componentgraph/core/ComponentNode.scala b/container-di/src/main/scala/com/yahoo/container/di/componentgraph/core/ComponentNode.scala
index 4261b874330..cc1745d6e35 100644
--- a/container-di/src/main/scala/com/yahoo/container/di/componentgraph/core/ComponentNode.scala
+++ b/container-di/src/main/scala/com/yahoo/container/di/componentgraph/core/ComponentNode.scala
@@ -113,7 +113,9 @@ class ComponentNode(componentId: ComponentId,
   private def initId(component: AnyRef) = {
     def checkAndSetId(c: AbstractComponent) {
       if (c.hasInitializedId && c.getId != componentId )
-        throw new IllegalStateException("Component with id '" + componentId + "' has set a conflicting component id: '" + c.getId + "'")
+        throw new IllegalStateException(
+          s"Component with id '$componentId' is trying to set its component id explicitly: '${c.getId}'. " +
+            "This is not allowed, so please remove any call to super() in your component's constructor.")
 
       c.initId(componentId)
     }