stefan-egli commented on code in PR #863:
URL: https://github.com/apache/jackrabbit-oak/pull/863#discussion_r1164398109


##########
oak-store-document/src/main/java/org/apache/jackrabbit/oak/plugins/document/mongo/MongoDocumentStore.java:
##########
@@ -1470,8 +1487,18 @@ public <T extends Document> boolean create(Collection<T> 
collection, List<Update
                 }
                 insertSuccess = true;
                 return true;
-            } catch (MongoException e) {
-                return false;
+            } catch (BsonMaximumSizeExceededException e) {
+                T doct = null;
+                for (T doc : docs) {
+                    doct = doc;
+                    // doc.getMemory()/2 - converting from UTF-16 to UTF-8
+                    if (doc.getMemory()/2 > SIZE_LIMIT) {

Review Comment:
   (I haven't followed all discussion) is UTF-16 always the case, or is there 
something that this could be made dependent upon ?



##########
oak-store-document/src/main/java/org/apache/jackrabbit/oak/plugins/document/mongo/MongoDocumentStore.java:
##########
@@ -1115,6 +1123,15 @@ private <T extends Document> T 
findAndModify(Collection<T> collection,
                 }
             }
             return oldDoc;
+        } catch (MongoWriteException e) {
+            WriteError werr = e.getError();
+            LOG.error("Failed to update the document with Id={} with error 
message '{}'",

Review Comment:
   ```suggestion
               LOG.error("Failed to update the document with Id={} with a 
MongoWriteException message '{}'",
   ```
   
   a bit a detail, but perhaps could be useful to explicitly state that it was 
a MongoWriteException (and a MongoCommandException below)



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