pgyori commented on a change in pull request #4273:
URL: https://github.com/apache/nifi/pull/4273#discussion_r425817343



##########
File path: 
nifi-nar-bundles/nifi-azure-bundle/nifi-azure-processors/src/main/java/org/apache/nifi/processors/azure/storage/FetchAzureDataLakeStorage.java
##########
@@ -67,6 +67,10 @@ public void onTrigger(ProcessContext context, ProcessSession 
session) throws Pro
             final DataLakeDirectoryClient directoryClient = 
dataLakeFileSystemClient.getDirectoryClient(directory);
             final DataLakeFileClient fileClient = 
directoryClient.getFileClient(fileName);
 
+            if (fileClient.getProperties().isDirectory()) {
+                throw new ProcessException(FILE.getDisplayName() + " (" + 
fileName + ") points to a directory. Full path: " + fileClient.getFilePath());

Review comment:
       It looks like switching to version 12.1.1 of azure-storage-file-datalake 
instead of 12.0.1 did not take effect in your build. Can you please verify that 
you rebuilt the entire nifi-azure-bundle and used the newly generated 
nifi-azure-nar in your running instance of NiFi (after restart)?




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