ashishkumar50 commented on code in PR #10000:
URL: https://github.com/apache/ozone/pull/10000#discussion_r3187594757
##########
hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/node/PendingContainerTracker.java:
##########
@@ -189,6 +190,47 @@ public boolean
hasEffectiveAllocatableSpaceForNewContainer(DatanodeInfo datanode
return false;
}
+ /**
+ * Atomically checks if the datanode has space for a new container and
records the allocation
+ * if space is available. This prevents race conditions where multiple
threads check space
+ * concurrently and over-allocate.
+ *
+ * @param datanodeInfo storage reports for the datanode
+ * @param containerID The container being allocated
+ * @return true if space was available and allocation was recorded, false
otherwise
+ */
+ public boolean checkSpaceAndRecordAllocation(DatanodeInfo datanodeInfo,
ContainerID containerID) {
+ Objects.requireNonNull(datanodeInfo, "datanodeInfo == null");
+ Objects.requireNonNull(containerID, "containerID == null");
+
+ TwoWindowBucket bucket = datanodeInfo.getPendingContainerAllocations();
+ synchronized (bucket) {
Review Comment:
Moved to TwoWindowBucket.
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