add retry logic for deleting files

qendpoint-core/src/main/java/com/the_qa_company/qendpoint/core/util/io/IOUtil.java

@@ -56,6 +56,8 @@
 import java.nio.file.FileVisitor;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.NoSuchFileException;
+import java.nio.file.FileSystemException;
 import java.nio.file.attribute.BasicFileAttributes;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -928,20 +930,54 @@ public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) {
 
 			@Override
 			public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
-				Files.delete(file);
+				deleteWithRetry(file);
 				return FileVisitResult.CONTINUE;
 			}
 
 			@Override
 			public FileVisitResult visitFileFailed(Path file, IOException exc) {
-				return FileVisitResult.TERMINATE;
+				// Log the failure, decide if you want to terminate or continue
+				System.err.println("Failed to visit file: " + file + ", error: " + exc.getMessage());
+				return FileVisitResult.TERMINATE; // Or CONTINUE, depending on
+													// desired behavior
 			}
 
 			@Override
 			public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
-				Files.delete(dir);
+				deleteWithRetry(dir);
 				return FileVisitResult.CONTINUE;
 			}
+
+			private void deleteWithRetry(Path targetPath) throws IOException {
+				final int MAX_RETRIES = 5;
+				final long RETRY_DELAY_MS = 100; // 100 milliseconds
+
+				for (int i = 0; i < MAX_RETRIES; i++) {
+					try {
+						Files.delete(targetPath);
+						return; // Success, exit retry loop
+
+					} catch (NoSuchFileException e) {
+						return;
+					} catch (FileSystemException e) {
+						if (e.getMessage().contains("Device or resource busy")
+								|| e.getMessage().contains("Directory not empty")) {
+							System.err.println("Attempt " + (i + 1) + " to delete " + targetPath + " failed: "
+									+ e.getMessage() + ". Retrying...");
+							try {
+								Thread.sleep(RETRY_DELAY_MS);
+							} catch (InterruptedException ie) {
+								Thread.currentThread().interrupt();
+								throw new IOException("Deletion interrupted for " + targetPath, ie);
+							}
+						} else {
+							throw e; // Re-throw other FileSystemExceptions
+										// immediately
+						}
+					}
+				}
+				throw new IOException("Failed to delete " + targetPath + " after " + MAX_RETRIES + " retries.");
+			}
 		});
 	}