kr11 commented on a change in pull request #2024:
URL: https://github.com/apache/iotdb/pull/2024#discussion_r524844723



##########
File path: 
tsfile/src/main/java/org/apache/iotdb/tsfile/utils/ReadWriteIOUtils.java
##########
@@ -708,6 +708,26 @@ public static ByteBuffer 
readByteBufferWithSelfDescriptionLength(ByteBuffer buff
     return byteBuffer;
   }
 
+  /**
+   * read bytes from an inputStream where the length is specified at the head 
of the inputStream.
+   * @param inputStream contains a int-type length and a stream
+   * @return bytebuffer
+   * @throws IOException if the read length doesn't equal to the self 
description length.
+   */
+  public static ByteBuffer readByteBufferWithSelfDescriptionLength(InputStream 
inputStream)
+      throws IOException {
+    int length = readInt(inputStream);

Review comment:
       Added in the comment :)




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