Github user PramodSSImmaneni commented on a diff in the pull request:
https://github.com/apache/incubator-apex-core/pull/271#discussion_r56440964
--- Diff:
engine/src/main/java/com/datatorrent/stram/engine/GenericNode.java ---
@@ -608,9 +610,9 @@ else if (tracker.ports[trackerIndex] == null) {
if (need2sleep) {
if (handleIdleTime && insideWindow) {
((IdleTimeHandler) operator).handleIdleTime();
- }
- else {
+ } else {
Thread.sleep(spinMillis);
+ spinMillis = Math.min(maxSpinMillis, spinMillis + 1);
--- End diff --
I had looked at this before in a difference scenario. Can we do a better
heuristic. We can have another timeout setting (which is less than streaming
window size) where we continue to do busy way till that timeout and if there is
no data till then, then initiate the stepwise sleep.
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