Github user kongweihan commented on a diff in the pull request:
https://github.com/apache/helix/pull/88#discussion_r117837530
--- Diff: helix-core/src/main/java/org/apache/helix/task/JobRebalancer.java
---
@@ -455,6 +454,44 @@ private ResourceAssignment
computeResourceMapping(String jobResource,
return ra;
}
+ /**
+ * If assignment is different from previous assignment, drop the old
running task if it's no
+ * longer assigned to the same instance, but not removing it from
excludeSet because the same task
+ * should not be assigned to the new instance right way.
+ */
+ private void dropRebalancedRunningTasks(Map<String, SortedSet<Integer>>
newAssignment,
+ Map<String, SortedSet<Integer>> oldAssignment, Map<Integer,
PartitionAssignment> paMap,
+ JobContext jobContext) {
+ for (String instance : oldAssignment.keySet()) {
+ for (Integer pId : oldAssignment.get(instance)) {
+ if (jobContext.getPartitionState(pId) == TaskPartitionState.RUNNING
+ && !newAssignment.get(instance).contains(pId)) {
+ paMap.put(pId, new PartitionAssignment(instance,
TaskPartitionState.DROPPED.name()));
+ jobContext.setPartitionState(pId, TaskPartitionState.DROPPED);
--- End diff --
I didn't see it gets updated. In the original code, if the CurrentState is
null, it will throw exception at line 287.
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