sodonnel commented on a change in pull request #881:
URL: https://github.com/apache/hadoop-ozone/pull/881#discussion_r420147161
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File path:
hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/container/ReplicationManager.java
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@@ -512,25 +523,60 @@ private void handleUnderReplicatedContainer(final
ContainerInfo container,
if (source.size() > 0) {
final int replicationFactor = container
.getReplicationFactor().getNumber();
- final int delta = replicationFactor - getReplicaCount(id, replicas);
+ // Want to check if the container is mis-replicated after considering
+ // inflight add and delete.
+ // Create a new list from source (healthy replicas minus pending
delete)
+ List<DatanodeDetails> targetReplicas = new ArrayList<>(source);
+ // Then add any pending additions
+ targetReplicas.addAll(replicationInFlight);
+
+ int delta = replicationFactor - getReplicaCount(id, replicas);
+ final ContainerPlacementStatus placementStatus =
+ containerPlacement.validateContainerPlacement(
+ targetReplicas, replicationFactor);
+ final int misRepDelta = placementStatus.additionalReplicaRequired();
Review comment:
The PlacementStatus.additionalReplicaRequired() method is intended to
state how many replicas are need to meet the placement policy and not the
replication factor. In other places (eg Recon) it might be useful to be able to
get the "additional racks required" separately from under replication.
I've added extra details in the PlacementStatus interface JavaDoc for
additionalReplicaRequired to make that more clear.
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