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YARN-11834: Capacity Scheduler Application Stuck In ACCEPTED State due to Race Condition #7806

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Merged
slfan1989 merged 2 commits into from
Jul 23, 2025
+9 −1
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YARN-11834: Capacity Scheduler Application Stuck In ACCEPTED State due to Race Condition #7806

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YARN-11834: Capacity Scheduler Application Stuck In ACCEPTED State du…
shameersss1 Jul 16, 2025
955c012
YARN-11834: Capacity Scheduler Application Stuck In ACCEPTED State du…
shameersss1 Jul 17, 2025
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10 changes: 9 additions & 1 deletion ...a/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/AbstractLeafQueue.java
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Original file line number Diff line number Diff line change
Expand Up @@ -1212,6 +1212,11 @@ public CSAssignment assignContainers(Resource clusterResource,
assignmentIterator.hasNext();) {
FiCaSchedulerApp application = assignmentIterator.next();

// Skip processing if the application is already removed from the applicationAttemptMap
if (!applicationAttemptMap.containsKey(application.getApplicationAttemptId())) {
continue;
}

ActivitiesLogger.APP.startAppAllocationRecording(activitiesManager,
node, SystemClock.getInstance().getTime(), application);

Expand Down Expand Up @@ -1264,7 +1269,10 @@ public CSAssignment assignContainers(Resource clusterResource,
userAssignable = canAssignToUser(clusterResource, application.getUser(),
userLimit, application, candidates.getPartition(),
currentResourceLimits);
if (!userAssignable && Resources.fitsIn(cul.reservation, appReserved)) {
if (!userAssignable
&& Resources.fitsIn(cul.reservation, appReserved)
// Consider updating cul only if the application attempt is active.
&& applicationAttemptMap.containsKey(application.getApplicationAttemptId())) {
cul.canAssign = false;
cul.reservation = appReserved;
}
Expand Down