david-streamlio commented on a change in pull request #9943:
URL: https://github.com/apache/pulsar/pull/9943#discussion_r596341448



##########
File path: 
pulsar-functions/instance/src/main/java/org/apache/pulsar/functions/instance/JavaInstanceRunnable.java
##########
@@ -736,8 +737,14 @@ private void setupOutput(ContextImpl contextImpl) throws 
Exception {
                 
pulsarSinkConfig.setProcessingGuarantees(FunctionConfig.ProcessingGuarantees.valueOf(
                         
this.instanceConfig.getFunctionDetails().getProcessingGuarantees().name()));
                 pulsarSinkConfig.setTopic(sinkSpec.getTopic());
-                pulsarSinkConfig.setForwardSourceMessageProperty(
+                
+                if 
(this.instanceConfig.getFunctionDetails().getComponentType()== 
ComponentType.SOURCE) {
+                  // Forward record level properties for all sources by default
+                  pulsarSinkConfig.setForwardSourceMessageProperty(true);
+                } else if 
(this.instanceConfig.getFunctionDetails().getComponentType() == 
ComponentType.SINK) {

Review comment:
       I more comprehensive solution would be to add a 
`ForwardSourceMessageProperty` to the configuration for ALL component types and 
use a default value of `true` for all type?  Seems like from a consistency 
perspective having all the components behave exactly the same w.r.t to forward 
properties but leave an option for the user to override this behavior as need.
   
   Thoughts?




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