File.renameTo method issue

Question

I have a Java program which processes upto 10000 text files a day. The average size of these files are 1KB to 2KB and the java program parses the contents of the text file, validates and loads them into a database table.
The program outline is as follows
File[] filesToProcess = sourceFolder.listFiles();
int fileCount = filesToProcess.length;
for (int i=0;i<fileCount;i++) {
File currentFile = filesToProcess;
MsgParser fileParser = new MsgParser(currentFile);
if ( fileParser.isMessageValid()) {
boolean uploadSuccess = fileParser.uploadToDB();
if (uploadSuccess) {
if (currentFile.renameTo(parseSuccessArchiveFile))
logger.info("File successfully moved to archive folder);
else
logger.info("File cannot be moved to archive folder);
} else {
if (currentFile.renameTo(parseFailureArchiveFile)
logger.info("Parser failed file moved to archive folder);
else
logger.info("Parser failed file cannot be moved to archive folder);
The above program outline works well. However the renameTo method is not renaming the parsed files successfully on all occasions. There is no performance issue involved here as the files keep streaming in throughout the day and the program is able to handle the parsing of the file(s) in a fraction of second.
The issue for me is that I keep picking the files to parse from the source folder at regular intervals ( after a full iteration of the files list, wait for 10 seconds before calling for a new set of files ) and cannot afford to have a failure in moving the file to the archive folder as otherwise, I end up parsing the same file multiple number of times, which I want to avoid.
Can anyone shed some light on the behavior of File.renameTo and how to make it work successfully?
Sundar

Answer 1

I am making the code more readable for you all and corrected some typo errors...
File[] filesToProcess = sourceFolder.listFiles();
int fileCount = filesToProcess.length;
for (int i=0;i<fileCount;i++) {
      File currentFile = filesToProcess;
      MsgParser fileParser = new MsgParser(currentFile);
      boolean uploadSuccess = false;
      if ( fileParser.isMessageValid())
           uploadSuccess = fileParser.uploadToDB();
      if (uploadSuccess) {
            if (currentFile.renameTo(parseSuccessArchiveFile))
                  logger.info("File successfully moved to archive folder);
            else
                  logger.info("File cannot be moved to archive folder);
      } else {
            if (currentFile.renameTo(parseFailureArchiveFile)
                  logger.info("Parser failed file moved to archive folder);
            else
                  logger.
                  info("Parser failed file cannot be moved to archive folder);
}