ayushtkn commented on code in PR #341:
URL: https://github.com/apache/tez/pull/341#discussion_r1547372195


##########
tez-runtime-internals/src/main/java/org/apache/tez/common/ProtoConverters.java:
##########
@@ -135,15 +138,22 @@ public static VertexManagerEvent 
convertVertexManagerEventFromProto(
     if (event.getUserPayload() != null) {
       builder.setUserPayload(ByteString.copyFrom(event.getUserPayload()));
     }
+    if (event.getSerializedPath() != null) {
+      
builder.setSerializedPath(ByteString.copyFrom(event.getSerializedPath().getBytes(Charsets.UTF_8)));
+    }
     return builder.build();
   }
 
-  public static InputDataInformationEvent
-      convertRootInputDataInformationEventFromProto(
+  public static InputDataInformationEvent 
convertRootInputDataInformationEventFromProto(
       EventProtos.RootInputDataInformationEventProto proto) {
-    InputDataInformationEvent diEvent = 
InputDataInformationEvent.createWithSerializedPayload(
-        proto.getSourceIndex(),
-        proto.hasUserPayload() ? proto.getUserPayload().asReadOnlyByteBuffer() 
: null);
+    ByteBuffer payload = proto.hasUserPayload() ? 
proto.getUserPayload().asReadOnlyByteBuffer() : null;
+    InputDataInformationEvent diEvent = null;
+    if (!proto.getSerializedPath().isEmpty()) {

Review Comment:
   should be ok if it can never reach & there is no public method which can 
reach here, else maybe we can have Preconditions or Assert to see we don't land 
up having two source of truth accidentally even in future, but I am ok



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