jackye1995 commented on a change in pull request #3175:
URL: https://github.com/apache/iceberg/pull/3175#discussion_r717274097



##########
File path: aws/src/main/java/org/apache/iceberg/aws/s3/S3OutputStream.java
##########
@@ -328,6 +330,15 @@ private static InputStream uncheckedInputStream(File file) 
{
     }
   }
 
+  private void createStagingDirectoryIfNotExists() throws SecurityException {
+    if (!stagingDirectory.exists()) {
+      boolean createdStagingDirectory = stagingDirectory.mkdirs();
+      if (createdStagingDirectory) {
+        LOG.info("Successfully created staging directory: {}", 
stagingDirectory.getAbsolutePath());
+      }

Review comment:
       else, add a LOG saying "Staging directory {} creation failed, or it is 
created by another process"

##########
File path: aws/src/main/java/org/apache/iceberg/aws/s3/S3OutputStream.java
##########
@@ -328,6 +330,15 @@ private static InputStream uncheckedInputStream(File file) 
{
     }
   }
 
+  private void createStagingDirectoryIfNotExists() throws SecurityException {
+    if (!stagingDirectory.exists()) {

Review comment:
       add a LOG saying something like "staging directoy {} not exist, trying 
to create one"




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