abstractdog commented on code in PR #339:
URL: https://github.com/apache/tez/pull/339#discussion_r1599582588


##########
tez-dag/src/main/java/org/apache/tez/dag/app/dag/impl/OutputCommitterContextImpl.java:
##########
@@ -34,14 +34,16 @@ public class OutputCommitterContextImpl implements 
OutputCommitterContext {
   private final String dagName;
   private final String vertexName;
   private final int vertexIdx;
+  private final int dagIdentifier;
   private final RootInputLeafOutput<OutputDescriptor, 
OutputCommitterDescriptor> output;
 
   public OutputCommitterContextImpl(ApplicationId applicationId,
       int dagAttemptNumber,
       String dagName,
       String vertexName,
       RootInputLeafOutput<OutputDescriptor, OutputCommitterDescriptor> output,
-      int vertexIdx) {
+      int vertexIdx,
+      int dagIdentifier) {

Review Comment:
   if we're already changing the signature, what about another order that looks 
better?
   is this context used somewhere else other than tez code? I guess it's not, 
we can use whatever we want, what about:
   ```
   dagAttemptNumber
   dagName
   vertexName
   dagId
   vertexId
   output
   ```



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