mkuchenbecker commented on code in PR #5860:
URL: https://github.com/apache/hadoop/pull/5860#discussion_r1269785090
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hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterClientProtocol.java:
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@@ -1928,9 +1929,17 @@ public BatchedEntries<OpenFileEntry> listOpenFiles(long
prevId,
@Override
public void msync() throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ, true);
- Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces();
+ Set<FederationNamespaceInfo> allNamespaces =
namenodeResolver.getNamespaces();
RemoteMethod method = new RemoteMethod("msync");
- rpcClient.invokeConcurrent(nss, method);
+ Set<FederationNamespaceInfo> namespacesEligibleForObserverReads = new
HashSet<>();
Review Comment:
How often does this change? Seems like the namenodeResolver could do this
calculation once and cache.
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