F64116045 commented on code in PR #11158:
URL: https://github.com/apache/ozone/pull/11158#discussion_r3891053564
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hadoop-ozone/mini-cluster/src/main/java/org/apache/hadoop/ozone/MiniOzoneClusterImpl.java:
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@@ -536,7 +547,7 @@ public MiniOzoneCluster build() throws IOException {
// Recreate the Ratis pipeline to prevent imbalanced node placement
across racks
// caused by asynchronous DN registration.
- if (racks != null && startDataNodes) {
+ if (racks != null && startDataNodes && numOfDatanodes >=
HddsProtos.ReplicationFactor.THREE.getNumber()) {
Review Comment:
Just to explain this additional change:
`TestStorageContainerManager` now calls `setRacks()` with only one datanode,
but `resetPipelinesForRackAwareness()` requires at least three.
Without this check, the cluster fails to start. This is safe because the
method only recreates a pipeline that requires three datanodes
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