HDFS-15557. Log the reason why a storage log file can't be deleted (#2274)

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/util/AtomicFileOutputStream.java

@@ -22,6 +22,7 @@ import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.FilterOutputStream;
 import java.io.IOException;
+import java.nio.file.Files;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -75,8 +76,12 @@ public class AtomicFileOutputStream extends FilterOutputStream {
         boolean renamed = tmpFile.renameTo(origFile);
         if (!renamed) {
           // On windows, renameTo does not replace.
-          if (origFile.exists() && !origFile.delete()) {
-            throw new IOException("Could not delete original file " + origFile);
+          if (origFile.exists()) {
+            try {
+              Files.delete(origFile.toPath());
+            } catch (IOException e) {
+              throw new IOException("Could not delete original file " + origFile, e);
+            }
           }
           try {
             NativeIO.renameTo(tmpFile, origFile);