LiuGuH commented on code in PR #6784:
URL: https://github.com/apache/hadoop/pull/6784#discussion_r1597404047
##########
hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterClientProtocol.java:
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@@ -1009,6 +1000,20 @@ public HdfsFileStatus getFileInfo(String src) throws
IOException {
return ret;
}
+ public RemoteResult<RemoteLocation, HdfsFileStatus>
getFileRemoteResult(String path)
+ throws IOException {
+ rpcServer.checkOperation(NameNode.OperationCategory.READ);
+
+ final List<RemoteLocation> locations = rpcServer.getLocationsForPath(path,
false, false);
+ RemoteMethod method =
+ new RemoteMethod("getFileInfo", new Class<?>[] {String.class}, new
RemoteParam());
+ // Check for file information sequentially
+ RemoteResult<RemoteLocation, HdfsFileStatus> result =
Review Comment:
This may not be true. Even locations only contains one namespace, it still
cannot decide whether the file exists or not. So getFileInfo is better to
execute at least once. Or it will send to namenode and namenode throw file is
not found.
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