diff --git a/arm-datalake-analytics/catalog/2015-10-01-preview/swagger/catalog.json b/arm-datalake-analytics/catalog/2015-10-01-preview/swagger/catalog.json
index 750204870cc3..895d19dfb805 100644
--- a/arm-datalake-analytics/catalog/2015-10-01-preview/swagger/catalog.json
+++ b/arm-datalake-analytics/catalog/2015-10-01-preview/swagger/catalog.json
@@ -2304,7 +2304,11 @@
       ],
       "properties": {
         "columns": {
-          "$ref": "#/definitions/TypeFieldInfo",
+          "type": "array",
+          "readOnly": true,
+          "items": {
+            "$ref": "#/definitions/TypeFieldInfo"
+          },
           "description": "the type field information associated with this table type."
         }
       },
diff --git a/arm-datalake-store/filesystem/2015-10-01-preview/swagger/filesystem.json b/arm-datalake-store/filesystem/2015-10-01-preview/swagger/filesystem.json
index 5c59fa84f987..ad4d5eed849c 100644
--- a/arm-datalake-store/filesystem/2015-10-01-preview/swagger/filesystem.json
+++ b/arm-datalake-store/filesystem/2015-10-01-preview/swagger/filesystem.json
@@ -517,6 +517,14 @@
             "required": true,
             "description": "The file contents to include when appending to the file."
           },
+          {
+            "name": "offset",
+            "in": "query",
+            "required": false,
+            "type": "integer",
+            "format": "int64",
+            "description": "The optional offset in the stream to begin the append operation. Default is to append at the end of the stream."
+          },
           {
             "name": "op",
             "in": "query",
@@ -1354,6 +1362,24 @@
       ],
       "description": "A WebHDFS exception thrown indicating the file or folder could not be found. Thrown when a 404 error response code is returned (not found)."
     },
+    "AdlsFileAlreadyExistsException": {
+      "x-ms-discriminator-value": "FileAlreadyExistsException",
+      "allOf": [ 
+        { 
+          "$ref":  "#/definitions/AdlsRemoteException" 
+        } 
+      ],
+      "description": "A WebHDFS exception thrown indicating the file or folder already exists. Thrown when a 403 error response code is returned (forbidden)."
+    },
+    "AdlsBadOffsetException": {
+      "x-ms-discriminator-value": "BadOffsetException",
+      "allOf": [ 
+        { 
+          "$ref":  "#/definitions/AdlsRemoteException" 
+        } 
+      ],
+      "description": "A WebHDFS exception thrown indicating the append or read is from a bad offset. Thrown when a 400 error response code is returned for append and open operations (Bad request)."
+    },
     "AdlsRuntimeException": {
       "x-ms-discriminator-value": "RuntimeException",
       "allOf": [