[FELIX-6261] [Regression] Empty property values are treated as String arrays

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: scr-2.1.18
• Fix Version/s: scr-2.1.20
• Component/s: Declarative Services (SCR)
• Assignee: Carsten Ziegeler
• Reporter: Carsten Ziegeler
• Created: 17/Apr/20 06:01
• Updated: 20/Apr/20 14:41
• Resolved: 17/Apr/20 13:45

Description

When updating scr from 2.1.16 to 2.1.18, Apache Sling fails to start with exceptions like
ERROR: bundle com.composum.core.commons:1.11.5 (103)[com.composum.sling.core.CoreConfigImpl(122)] : The activate method has thrown an exception
java.lang.ClassCastException: [Ljava.lang.String; cannot be cast to java.lang.String
at com.composum.sling.core.CoreConfigImpl.activate(CoreConfigImpl.java:193)
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.methods.BaseMethod.invokeMethod(BaseMethod.java:242)
at org.apache.felix.scr.impl.inject.methods.BaseMethod.access$500(BaseMethod.java:41)
at org.apache.felix.scr.impl.inject.methods.BaseMethod$Resolved.invoke(BaseMethod.java:678)
at org.apache.felix.scr.impl.inject.methods.BaseMethod.invoke(BaseMethod.java:524)
at org.apache.felix.scr.impl.inject.methods.ActivateMethod.invoke(ActivateMethod.java:318)
at org.apache.felix.scr.impl.inject.methods.ActivateMethod.invoke(ActivateMethod.java:308)
at org.apache.felix.scr.impl.manager.SingleComponentManager.createImplementationObject(SingleComponentManager.java:342)
at org.apache.felix.scr.impl.manager.SingleComponentManager.createComponent(SingleComponentManager.java:115)
at org.apache.felix.scr.impl.manager.SingleComponentManager.getService(SingleComponentManager.java:984)
at org.apache.felix.scr.impl.manager.SingleComponentManager.getServiceInternal(SingleComponentManager.java:957)
at org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:757)
at org.apache.felix.scr.impl.manager.AbstractComponentManager.enableInternal(AbstractComponentManager.java:667)
at org.apache.felix.scr.impl.manager.AbstractComponentManager.enable(AbstractComponentManager.java:433)
at org.apache.felix.scr.impl.manager.ConfigurableComponentHolder.enableComponents(ConfigurableComponentHolder.java:666)
at org.apache.felix.scr.impl.BundleComponentActivator.initialEnable(BundleComponentActivator.java:353)
at org.apache.felix.scr.impl.Activator.loadComponents(Activator.java:553)
at org.apache.felix.scr.impl.Activator.access$200(Activator.java:69)
at org.apache.felix.scr.impl.Activator$ScrExtension.start(Activator.java:424)
at org.apache.felix.scr.impl.AbstractExtender.createExtension(AbstractExtender.java:196)
at org.apache.felix.scr.impl.AbstractExtender.modifiedBundle(AbstractExtender.java:169)
at org.apache.felix.scr.impl.AbstractExtender.modifiedBundle(AbstractExtender.java:49)