exceptionfactory commented on code in PR #6460:
URL: https://github.com/apache/nifi/pull/6460#discussion_r1003428262


##########
nifi-nar-bundles/nifi-mongodb-bundle/nifi-mongodb-processors/src/main/java/org/apache/nifi/processors/mongodb/gridfs/PutGridFS.java:
##########
@@ -212,9 +267,10 @@ private boolean canUploadFile(ProcessContext context, 
FlowFile input, String buc
 
             Document query;
             if (uniqueness.equals(UNIQUE_BOTH.getValue())) {
-                query = new Document().append("filename", 
fileName).append("md5", hash);
+                query = new Document().append("filename", fileName)
+                        .append("metadata", new Document(hashMetadataName, 
hash));
             } else if (uniqueness.equals(UNIQUE_HASH.getValue())) {
-                query = new Document().append("md5", hash);
+                query = new Document().append("metadata", new 
Document(hashMetadataName, hash));

Review Comment:
   Thanks for the reply @MikeThomsen. In order to avoid breaking existing users 
of PutGridFS, it seems like we either need to add server version checking, or 
perhaps a new configurable strategy property along the lines that you 
mentioned. Either way, we should have a path forward that maintains the current 
functionality, but also provides a new option that moves away from the 
deprecated `md5` approach.



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