void release() {
      if (dataBlockEncodingCtx != null) {
        dataBlockEncodingCtx.close();
        dataBlockEncodingCtx = null;
      }
      if (defaultBlockEncodingCtx != null) {
        defaultBlockEncodingCtx.close();
        defaultBlockEncodingCtx = null;
      }
    }
Releases resources used by this writer.
hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileBlock.java