HADOOP-14512. WASB atomic rename should not throw exception if the file is neither in src nor in dst when doing the rename. Contributed by Duo Xu

(cherry picked from commit 325163f23f727e82379d4a385b73aa3a04a510f6)

hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/NativeAzureFileSystem.java

@@ -581,10 +581,12 @@ public class NativeAzureFileSystem extends FileSystem {
         // The rename already finished, so do nothing.
         ;
       } else {
-        throw new IOException(
-            "Attempting to complete rename of file " + srcKey + "/" + fileName
-            + " during folder rename redo, and file was not found in source "
-            + "or destination.");
+        // HADOOP-14512
+        LOG.warn(
+          "Attempting to complete rename of file " + srcKey + "/" + fileName
+          + " during folder rename redo, and file was not found in source "
+          + "or destination " + dstKey + "/" + fileName + ". "
+          + "This must mean the rename of this file has already completed");
       }
     }