[FELIX-5729] NoSuchFieldError when @Reference referenceInterface type different than field type

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: maven-scr-plugin 1.26.0, scr ant task 1.18.0, scr generator 1.18.0, scr bnd plugin 1.9.0
• Component/s: SCR Tooling
• Assignee: Carsten Ziegeler
• Reporter: Ioan-Cristian Linte
• Created: 25/Oct/17 09:24
• Updated: 15/Jan/18 05:55
• Resolved: 08/Nov/17 15:19

Description

NoSuchFieldError is thrown when injecting dependencies for a component Foo that has a field bar of type T1 with @Reference(referenceInterface = T2.class) and T2 implements T1.
This error is caused by the bind/unbind methods generated by maven-scr-plugin which have bytecode generated for get/set field bar operations with field descriptor of type T2 instead of T1.

Bytecode:

protected void bindBar(T2);
    Code:
       0: aload_0
       1: aload_1
       2: putfield      #95                 // Field bar:LT2;
       5: return

  protected void unbindBar(T2);
    Code:
       0: aload_0
       1: getfield      #95                 // Field bar:LT2;
       4: aload_1
       5: if_acmpne     13
       8: aload_0
       9: aconst_null
      10: putfield      #95                 // Field bar:LT2;

StackTrace:

The bindBar method has thrown an exception (java.lang.NoSuchFieldError: bar)
java.lang.NoSuchFieldError: bar
	at Foo.bindBar(Foo.java)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.felix.scr.impl.inject.BaseMethod.invokeMethod(BaseMethod.java:224)
	at org.apache.felix.scr.impl.inject.BaseMethod.access$500(BaseMethod.java:39)
	at org.apache.felix.scr.impl.inject.BaseMethod$Resolved.invoke(BaseMethod.java:617)
	at org.apache.felix.scr.impl.inject.BaseMethod.invoke(BaseMethod.java:501)
	at org.apache.felix.scr.impl.inject.BindMethod.invoke(BindMethod.java:655)
	at org.apache.felix.scr.impl.manager.DependencyManager.doInvokeBindMethod(DependencyManager.java:1722)
	at org.apache.felix.scr.impl.manager.DependencyManager.open(DependencyManager.java:1556)
	at org.apache.felix.scr.impl.manager.SingleComponentManager.createImplementationObject(SingleComponentManager.java:261)
	at org.apache.felix.scr.impl.manager.SingleComponentManager.createComponent(SingleComponentManager.java:109)
	at org.apache.felix.scr.impl.manager.SingleComponentManager.getService(SingleComponentManager.java:906)
	at org.apache.felix.scr.impl.manager.SingleComponentManager.getServiceInternal(SingleComponentManager.java:879)
	at org.apache.felix.scr.impl.manager.SingleComponentManager.getService(SingleComponentManager.java:823)