Github user ramkrish86 commented on a diff in the pull request:
https://github.com/apache/flink/pull/2510#discussion_r79384469
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/operators/JoinDriver.java
---
@@ -128,17 +130,22 @@ public void prepare() throws Exception{
ConfigConstants.DEFAULT_RUNTIME_HASH_JOIN_BLOOM_FILTERS);
// create and return joining iterator according to provided
local strategy.
- if (objectReuseEnabled) {
- switch (ls) {
- case INNER_MERGE:
- this.joinIterator = new
ReusingMergeInnerJoinIterator<>(in1, in2,
+ if (reset) {
+ resetForIterativeTasks(in1, in2, serializer1,
serializer2, comparator1, comparator2, pairComparatorFactory);
+ reset = false;
+ }
+ if (joinIterator == null) {
--- End diff --
Yes. I saw this pattern and how it was used. The existing ResettableDriver
impls like
JoinWithSolutionSetFirstDriver, AbstractCachedBuildSideJoinDriver was
actually doing things in
`initialize()` was called only once for the first time and was leaving out
`prepare()` as empty as it was called for every iteration.
Now we may have to change even them if we need to unify all. I can make
those changes. Let me check. Thanks @ggevay .
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