diff --git a/sdk/storage/azure-storage-file-datalake/CHANGELOG.md b/sdk/storage/azure-storage-file-datalake/CHANGELOG.md
index 9f82c3de79cd3..36e5f7e85e3cd 100644
--- a/sdk/storage/azure-storage-file-datalake/CHANGELOG.md
+++ b/sdk/storage/azure-storage-file-datalake/CHANGELOG.md
@@ -11,6 +11,7 @@
 ### Bugs Fixed
 
 ### Other Changes
+- Deprecated the always-failing API `DataLakeFileClient.flush(long)` to avoid confusion regarding overwrite semantics in DataLake.
 
 ## 12.13.2 (2023-01-10)
 
diff --git a/sdk/storage/azure-storage-file-datalake/src/main/java/com/azure/storage/file/datalake/DataLakeFileAsyncClient.java b/sdk/storage/azure-storage-file-datalake/src/main/java/com/azure/storage/file/datalake/DataLakeFileAsyncClient.java
index 816d3d1452048..e7bff24ee64db 100644
--- a/sdk/storage/azure-storage-file-datalake/src/main/java/com/azure/storage/file/datalake/DataLakeFileAsyncClient.java
+++ b/sdk/storage/azure-storage-file-datalake/src/main/java/com/azure/storage/file/datalake/DataLakeFileAsyncClient.java
@@ -1199,10 +1199,11 @@ Mono<Response<Void>> appendWithResponse(Flux<ByteBuffer> data, long fileOffset,
      * Docs</a></p>
      *
      * @param position The length of the file after all data has been written.
-     *
      * @return A reactive response containing the information of the created resource.
+     * @deprecated See {@link #flush(long, boolean)} instead.
      */
     @ServiceMethod(returns = ReturnType.SINGLE)
+    @Deprecated
     public Mono<PathInfo> flush(long position) {
         return flush(position, false);
     }
diff --git a/sdk/storage/azure-storage-file-datalake/src/main/java/com/azure/storage/file/datalake/DataLakeFileClient.java b/sdk/storage/azure-storage-file-datalake/src/main/java/com/azure/storage/file/datalake/DataLakeFileClient.java
index 48b7daeb4dffb..f69e87b993b0f 100644
--- a/sdk/storage/azure-storage-file-datalake/src/main/java/com/azure/storage/file/datalake/DataLakeFileClient.java
+++ b/sdk/storage/azure-storage-file-datalake/src/main/java/com/azure/storage/file/datalake/DataLakeFileClient.java
@@ -868,10 +868,11 @@ public Response<Void> appendWithResponse(BinaryData data, long fileOffset,
      * Docs</a></p>
      *
      * @param position The length of the file after all data has been written.
-     *
      * @return Information about the created resource.
+     * @deprecated See {@link #flush(long, boolean)} instead.
      */
     @ServiceMethod(returns = ReturnType.SINGLE)
+    @Deprecated
     public PathInfo flush(long position) {
         return flush(position, false);
     }