tomscut created HDFS-16359:
------------------------------

             Summary: RBF: RouterRpcServer#invokeAtAvailableNs does not take 
effect when retrying
                 Key: HDFS-16359
                 URL: https://issues.apache.org/jira/browse/HDFS-16359
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: tomscut
            Assignee: tomscut


RouterRpcServer#invokeAtAvailableNs does not take effect when retrying.

The original code of RouterRpcServer#getNameSpaceInfo looks like this:
{code:java}
private Set<FederationNamespaceInfo> getNameSpaceInfo(String nsId) {
  Set<FederationNamespaceInfo> namespaceInfos = new HashSet<>();
  for (FederationNamespaceInfo ns : namespaceInfos) {
    if (!nsId.equals(ns.getNameserviceId())) {
      namespaceInfos.add(ns);
    }
  }
  return namespaceInfos;
}  {code}



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