Github user chaithu14 commented on a diff in the pull request:
https://github.com/apache/apex-core/pull/362#discussion_r72926469
--- Diff:
engine/src/main/java/com/datatorrent/stram/plan/physical/PhysicalPlan.java ---
@@ -962,8 +963,11 @@ private void redoPartitions(PMapping currentMapping,
String note)
mainPC.operatorIdToPartition.put(p.getId(), newPartition);
}
+ // Get the deepest down stream mapping
+ PMapping downStreamMapping = currentMapping;
--- End diff --
If partitionContexts linked hashmap exists then downStreamMapping be the
last element of hasmap otherwise downStreamMapping be the currentMapping.
Lets say, the physical dag before repartition as below :
A1 -> B1 -> C1 -> D1 and parallel partition between A -> B and B -> C.
If A is repartitioned to 3 then
downStreamMapping would be the Operator C's mapping.
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