mayankshriv commented on code in PR #14214:
URL: https://github.com/apache/pinot/pull/14214#discussion_r1800301360
##########
pinot-common/src/main/java/org/apache/pinot/common/utils/helix/IdealStateGroupCommit.java:
##########
@@ -124,34 +124,27 @@ public IdealState commit(HelixManager helixManager,
String resourceName,
Entry first = queue._pending.poll();
processed.add(first);
String mergedResourceName = first._resourceName;
- HelixDataAccessor dataAccessor = helixManager.getHelixDataAccessor();
- PropertyKey idealStateKey =
dataAccessor.keyBuilder().idealStates(resourceName);
- IdealState idealState = dataAccessor.getProperty(idealStateKey);
-
- // Make a copy of the idealState above to pass it to the updater
- // NOTE: new IdealState(idealState.getRecord()) does not work
because it's shallow copy for map fields and
- // list fields
- IdealState idealStateCopy = HelixHelper.cloneIdealState(idealState);
- /**
- * If the local cache does not contain a value, need to check if
there is a
- * value in ZK; use it as initial value if exists
- */
- IdealState updatedIdealState = first._updater.apply(idealStateCopy);
- first._updatedIdealState = updatedIdealState;
- Iterator<Entry> it = queue._pending.iterator();
- while (it.hasNext()) {
- Entry ent = it.next();
- if (!ent._resourceName.equals(mergedResourceName)) {
- continue;
- }
- processed.add(ent);
- updatedIdealState = ent._updater.apply(idealStateCopy);
- ent._updatedIdealState = updatedIdealState;
- it.remove();
- }
- IdealState finalUpdatedIdealState = updatedIdealState;
- updateIdealState(helixManager, resourceName, anyIdealState ->
finalUpdatedIdealState,
+ updateIdealState(helixManager, mergedResourceName, idealState -> {
+ // Make a copy of the idealState above to pass it to the
updater
+ // NOTE: new IdealState(idealState.getRecord()) does not work
because it's shallow copy for map fields
+ // and list fields
+ IdealState idealStateCopy =
HelixHelper.cloneIdealState(idealState);
+ IdealState updatedIdealState =
first._updater.apply(idealStateCopy);
+ first._updatedIdealState = updatedIdealState;
+ Iterator<Entry> it = queue._pending.iterator();
+ while (it.hasNext()) {
+ Entry ent = it.next();
+ if (!ent._resourceName.equals(mergedResourceName)) {
+ continue;
+ }
+ processed.add(ent);
+ updatedIdealState = ent._updater.apply(updatedIdealState);
+ ent._updatedIdealState = updatedIdealState;
+ it.remove();
+ }
+ return updatedIdealState;
+ },
retryPolicy, noChangeOk);
Review Comment:
Same question as @jasperjiaguo. If the retry eventually fails, the algorithm
would have removed the changes from the queue and we would lose them. Perhaps
we need to only remove from queue once we know that the update (or retry) has
been successful.
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