saxenapranav commented on code in PR #6699:
URL: https://github.com/apache/hadoop/pull/6699#discussion_r1568309007


##########
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/AzureBlobFileSystemStore.java:
##########
@@ -848,32 +848,37 @@ public AbfsInputStream openFileForRead(Path path,
               encryptionContext.getBytes(StandardCharsets.UTF_8));
         }
       } else {
-        AbfsHttpOperation op = client.getPathStatus(relativePath, false,
-            tracingContext, null).getResult();
-        resourceType = op.getResponseHeader(
-            HttpHeaderConfigurations.X_MS_RESOURCE_TYPE);
-        contentLength = Long.parseLong(
-            op.getResponseHeader(HttpHeaderConfigurations.CONTENT_LENGTH));
-        eTag = op.getResponseHeader(HttpHeaderConfigurations.ETAG);
-        /*
-         * For file created with ENCRYPTION_CONTEXT, client shall receive
-         * encryptionContext from header field: X_MS_ENCRYPTION_CONTEXT.
-         */
-        if (client.getEncryptionType() == EncryptionType.ENCRYPTION_CONTEXT) {
-          final String fileEncryptionContext = op.getResponseHeader(
-              HttpHeaderConfigurations.X_MS_ENCRYPTION_CONTEXT);
-          if (fileEncryptionContext == null) {
-            LOG.debug("EncryptionContext missing in GetPathStatus response");
-            throw new PathIOException(path.toString(),
-                "EncryptionContext not present in GetPathStatus response 
headers");
+        if (client.getEncryptionType() == EncryptionType.ENCRYPTION_CONTEXT
+            || !abfsConfiguration.getHeadOptimizationForInputStream()) {
+          final AbfsHttpOperation op = client.getPathStatus(relativePath, 
false,
+              tracingContext, null).getResult();
+          resourceType = op.getResponseHeader(
+              HttpHeaderConfigurations.X_MS_RESOURCE_TYPE);
+          contentLength = Long.parseLong(
+              op.getResponseHeader(HttpHeaderConfigurations.CONTENT_LENGTH));
+          eTag = op.getResponseHeader(HttpHeaderConfigurations.ETAG);
+
+          /*
+           * For file created with ENCRYPTION_CONTEXT, client shall receive
+           * encryptionContext from header field: X_MS_ENCRYPTION_CONTEXT.
+           */
+          if (client.getEncryptionType() == EncryptionType.ENCRYPTION_CONTEXT) 
{
+            final String fileEncryptionContext = op.getResponseHeader(
+                HttpHeaderConfigurations.X_MS_ENCRYPTION_CONTEXT);
+            if (fileEncryptionContext == null) {
+              LOG.debug("EncryptionContext missing in GetPathStatus response");
+              throw new PathIOException(path.toString(),
+                  "EncryptionContext not present in GetPathStatus response 
headers");
+            }
+            contextEncryptionAdapter = new ContextProviderEncryptionAdapter(
+                client.getEncryptionContextProvider(), getRelativePath(path),
+                fileEncryptionContext.getBytes(StandardCharsets.UTF_8));
           }
-          contextEncryptionAdapter = new ContextProviderEncryptionAdapter(
-              client.getEncryptionContextProvider(), getRelativePath(path),
-              fileEncryptionContext.getBytes(StandardCharsets.UTF_8));
         }
       }
 
-      if (parseIsDirectory(resourceType)) {
+      if (!abfsConfiguration.getHeadOptimizationForInputStream()

Review Comment:
   You are correct. This was a bug! Has been fixed. This block will get tested 
as part of AbstractContractOpenTests#testOpenReadDir



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