symious opened a new pull request, #3350:
URL: https://github.com/apache/ozone/pull/3350
## What changes were proposed in this pull request?
In `NodeSchemaLoader.init()`, the file of "network-topology-default.xml" is
loaded to retrieve the topology schema.
By default the result schema is "/datacenter/rack/nodegroup/node", and the
schema size is 4, since datacenter is treated as "ROOT".
The schema size will also be sent to NetworkTopologyImpl to build the
topology, the schema size is used as maxLevel.
```
public NetworkTopologyImpl(ConfigurationSource conf) {
schemaManager = NodeSchemaManager.getInstance();
schemaManager.init(conf);
maxLevel = schemaManager.getMaxLevel();
factory = InnerNodeImpl.FACTORY;
clusterTree = factory.newInnerNode(ROOT, null, null,
NetConstants.ROOT_LEVEL,
schemaManager.getCost(NetConstants.ROOT_LEVEL));
}
```
But for "/datacenter/rack/nodegroup/node" the maxLevel is in fact 5, the
reason of the issue is that "datacenter" is treated as "ROOT" incorrectly.
While the yaml file version is correctly treated "datacenter" to a InnerNode.
## What is the link to the Apache JIRA
https://issues.apache.org/jira/browse/HDDS-6648
## How was this patch tested?
unit test.
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