Github user vrozov commented on a diff in the pull request:
https://github.com/apache/apex-core/pull/359#discussion_r71801328
--- Diff:
engine/src/main/java/com/datatorrent/stram/plan/physical/PhysicalPlan.java ---
@@ -895,8 +895,10 @@ private void redoPartitions(PMapping currentMapping,
String note)
addedPartitions.add(newPartition);
} else {
// check whether mapping was changed
+ int currentPartitionsSize = mainPC.currentPartitions.size();
for (DefaultPartition<Operator> pi : mainPC.currentPartitions) {
- if (pi == newPartition && pi.isModified()) {
+ if (pi == newPartition && (pi.isModified() ||
--- End diff --
@tweise Should not redeploy of downstream being done only when downstream
pipeline has a unifier and only unifier needs to be redeployed for the pipeline
connected to the current partition? For example, if logical dag is defined as:
```
A->B-C->Aggregator
```
and it is partitioned to 2 pipelines starting with A:
```
A1->B1->C1->
U->Aggregator
A2->B2->C2->
```
and A is repartitioned to 3:
```
A1->B1->C1->
A2->B2->C2->U->Aggregator
A3->B3->C3->
```
A1->B1->C1 and A2->B2->C2 don't need to be redeploed?
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