[HDFS-16073] Remove redundant RPC requests for getFileLinkInfo in ClientNamenodeProtocolTranslatorPB

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.4.0, 3.2.3, 3.3.2
• Fix Version/s: 3.4.0, 3.2.3, 3.3.2
• Component/s: hdfs-client
• Target Version/s: 3.4.0, 3.2.3, 3.3.2
• Hadoop Flags: Reviewed
• Assignee: lei w
• Reporter: lei w
• Created: 16/Jun/21 03:50
• Updated: 11/Feb/24 09:03
• Resolved: 16/Jun/21 10:38

Description

Remove redundant RPC requests for getFileLinkInfo in ClientNamenodeProtocolTranslatorPB. The original logic is as follows：

@Override
public HdfsFileStatus getFileLinkInfo(String src) throws IOException {
  GetFileLinkInfoRequestProto req = GetFileLinkInfoRequestProto.newBuilder()
      .setSrc(src).build();
  try {
    GetFileLinkInfoResponseProto result = rpcProxy.getFileLinkInfo(null, req);// First getFileLinkInfo RPC request
    return result.hasFs() ?
        PBHelperClient.convert(rpcProxy.getFileLinkInfo(null, req).getFs()) :// Repeated getFileLinkInfo RPC request
        null;
  } catch (ServiceException e) {
    throw ProtobufHelper.getRemoteException(e);
  }
}