long seed = 1;
DFSTestUtil.createFile(dfs, pathConcatTarget, length, replication, seed);
DFSTestUtil.createFile(dfs, pathConcatFiles[0], length, replication, seed);
DFSTestUtil.createFile(dfs, pathConcatFiles[1], length, replication, seed);
dfs.concat(pathConcatTarget, pathConcatFiles);
// OP_SYMLINK 17
Path pathSymlink = new Path("/file_symlink");
fc.createSymlink(pathConcatTarget, pathSymlink, false);
// OP_GET_DELEGATION_TOKEN 18
final Token<DelegationTokenIdentifier> token =