Github user StefanRRichter commented on a diff in the pull request:
https://github.com/apache/flink/pull/3770#discussion_r113415296
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/jobgraph/JobVertex.java ---
@@ -125,6 +132,8 @@ public JobVertex(String name) {
public JobVertex(String name, JobVertexID id) {
this.name = name == null ? DEFAULT_NAME : name;
this.id = id == null ? new JobVertexID() : id;
+ this.operatorIDs.add(new OperatorID(this.id.getLowerPart(),
this.id.getUpperPart()));
+ this.operatorIdsAlternatives.add(null);
--- End diff --
Why is it required to add `null`here, which seems strange? Either this is
not required or indicates some implicit contracts about
`operatorIdsAlternatives` that would at least justify a comment or (even
better) a change. As far as I can see, it is just not required. Or do I miss
something?
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