steveloughran commented on a change in pull request #1872: Hadoop 16890: Change 
in expiry calculation for MSI token provider
URL: https://github.com/apache/hadoop/pull/1872#discussion_r389574936
 
 

 ##########
 File path: 
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/oauth2/AzureADAuthenticator.java
 ##########
 @@ -408,17 +409,30 @@ private static AzureADToken 
parseTokenFromStream(InputStream httpResponseStream)
           if (fieldName.equals("access_token")) {
             token.setAccessToken(fieldValue);
           }
+
           if (fieldName.equals("expires_in")) {
-            expiryPeriod = Integer.parseInt(fieldValue);
+            expiryPeriodInSecs = Integer.parseInt(fieldValue);
+          }
+
+          if (fieldName.equals("expires_on")) {
+            expiresOnInSecs = Long.parseLong(fieldValue);
           }
+
         }
         jp.nextToken();
       }
       jp.close();
-      long expiry = System.currentTimeMillis();
-      expiry = expiry + expiryPeriod * 1000L; // convert expiryPeriod to 
milliseconds and add
-      token.setExpiry(new Date(expiry));
-      LOG.debug("AADToken: fetched token with expiry " + 
token.getExpiry().toString());
+      if (expiresOnInSecs > 0) {
+        token.setExpiry(new Date(expiresOnInSecs * 1000));
+      } else {
+        long expiry = System.currentTimeMillis();
+        expiry = expiry + expiryPeriodInSecs
+            * 1000L; // convert expiryPeriod to milliseconds and add
 
 Review comment:
   put expiryPeriod and * 1000 on same line. Also, feel free to use the new 
java time classes which are complex but powerful once you start to use them

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