hfile split occurs during bulkload, the new HFile file does not specify favored nodes

1. 1. BulkloadHFilesTool.class

/**

• Copy half of an HFile into a new HFile.
  */
  private static void copyHFileHalf(Configuration conf, Path inFile, Path outFile,
  Reference reference, ColumnFamilyDescriptor familyDescriptor) throws IOException {
  FileSystem fs = inFile.getFileSystem(conf);
  CacheConfig cacheConf = CacheConfig.DISABLED;
  HalfStoreFileReader halfReader = null;
  StoreFileWriter halfWriter = null;
  try {
  ReaderContext context = new ReaderContextBuilder().withFileSystemAndPath(fs, inFile).build();
  StoreFileInfo storeFileInfo =
  new StoreFileInfo(conf, fs, fs.getFileStatus(inFile), reference);
  storeFileInfo.initHFileInfo(context);
  halfReader = (HalfStoreFileReader) storeFileInfo.createReader(context, cacheConf);
  storeFileInfo.getHFileInfo().initMetaAndIndex(halfReader.getHFileReader());
  Map<byte[], byte[]> fileInfo = halfReader.loadFileInfo();

int blocksize = familyDescriptor.getBlocksize();
Algorithm compression = familyDescriptor.getCompressionType();
BloomType bloomFilterType = familyDescriptor.getBloomFilterType();
HFileContext hFileContext = new HFileContextBuilder().withCompression(compression)
.withChecksumType(StoreUtils.getChecksumType(conf))
.withBytesPerCheckSum(StoreUtils.getBytesPerChecksum(conf)).withBlockSize(blocksize)
.withDataBlockEncoding(familyDescriptor.getDataBlockEncoding()).withIncludesTags(true)
.withCreateTime(EnvironmentEdgeManager.currentTime()).build();
halfWriter = new StoreFileWriter.Builder(conf, cacheConf, fs).withFilePath(outFile)
.withBloomType(bloomFilterType).withFileContext(hFileContext).build();
HFileScanner scanner = halfReader.getScanner(false, false, false);
scanner.seekTo();

...

When hfile splitting occurs during bulkload, the new HFile file does not specify favored nodes, which will affect the locality of data. Internally, we implemented a version of the code that allows us to specify the favored nodes of the split HFile in copyHFileHalf() to avoid compromising locality