Chunk getJumboChunk(int jumboSize) {
    int allocSize = jumboSize + SIZEOF_CHUNK_HEADER;

    if (allocSize <= this.getChunkSize(ChunkType.DATA_CHUNK)) {
      LOG.warn("Jumbo chunk size " + jumboSize + " must be more than regular chunk size "
        + this.getChunkSize(ChunkType.DATA_CHUNK) + ". Converting to regular chunk.");
      return getChunk();
    }
    // the new chunk is going to hold the jumbo cell data and needs to be referenced by
    // a strong map.
    return getChunk(ChunkType.JUMBO_CHUNK, allocSize);
  }
Creates and inits a chunk of a special size, bigger than a regular chunk size. Such a chunk
will never come from pool and will always be on demand allocated.
@return the chunk that was initialized
@param jumboSize the special size to be used
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ChunkCreator.java