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https://issues.apache.org/jira/browse/HADOOP-19604?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18007742#comment-18007742
 ] 

ASF GitHub Bot commented on HADOOP-19604:
-----------------------------------------

anmolanmol1234 commented on code in PR #7777:
URL: https://github.com/apache/hadoop/pull/7777#discussion_r2212611621


##########
hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azurebfs/ITestAzureBlobFileSystemChecksum.java:
##########
@@ -61,9 +64,36 @@ public class ITestAzureBlobFileSystemChecksum extends 
AbstractAbfsIntegrationTes
   private static final int MB_15 = 15 * ONE_MB;
   private static final int MB_16 = 16 * ONE_MB;
   private static final String INVALID_MD5_TEXT = "Text for Invalid MD5 
Computation";
+  private MessageDigest md = null;
 
   public ITestAzureBlobFileSystemChecksum() throws Exception {
     super();
+    try {
+      md = MessageDigest.getInstance(MD5);
+    } catch (NoSuchAlgorithmException e) {
+      // MD5 algorithm not available; md will remain null
+    }
+  }
+
+  /**
+   * Computes the MD5 checksum of a specified portion of the input byte array.
+   *
+   * @param data The byte array containing the data to compute the MD5 
checksum for.
+   * @param off The starting offset in the byte array.
+   * @param length The number of bytes to include in the checksum computation.
+   * @return The Base64-encoded MD5 checksum of the specified data, or null if 
the digest is empty.
+   * @throws IllegalArgumentException If the offset or length is invalid for 
the given byte array.
+   */
+  public String getMd5(byte[] data, int off, int length) {

Review Comment:
   makes sense, taken



##########
hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azurebfs/ITestWasbAbfsCompatibility.java:
##########
@@ -42,10 +51,28 @@
  * Test compatibility between ABFS client and WASB client.
  */
 public class ITestWasbAbfsCompatibility extends AbstractAbfsIntegrationTest {
+

Review Comment:
   taken





> ABFS: Fix WASB ABFS compatibility issues
> ----------------------------------------
>
>                 Key: HADOOP-19604
>                 URL: https://issues.apache.org/jira/browse/HADOOP-19604
>             Project: Hadoop Common
>          Issue Type: Sub-task
>    Affects Versions: 3.4.1
>            Reporter: Anmol Asrani
>            Assignee: Anmol Asrani
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 3.4.1
>
>
> Fix WASB ABFS compatibility issues. Fix issues such as:-
>  # BlockId computation to be consistent across clients for PutBlock and 
> PutBlockList
>  # Restrict url encoding of certain json metadata during setXAttr calls.
>  # Maintain the md5 hash of whole block to validate data integrity during 
> flush.



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