Duplicate File Handling Issues - Sender File Adapter - SAP PO 7.31 - Single Stack

Question

Hi All,
We have a requirement to avoid processing of duplicate files. Our system is PI 7.31 Enh. Pack 1 SP 23. I tried using the 'Duplicate File Handling' feature in Sender File Adapter but things are not working out as expected. I processed same file again and again and PO is creating successful messages everytime rather than generating alerts/warnings or deactivating the channel.
I went through the link  Michal's PI tips: Duplicate handling in file adapter - 7.31  . I have maintained similar setting but unable to get the functionality achieved. Is there anything I am missing or any setting that is required apart from the Duplicate file handling check box and a threshold count??
Any help will be highly appreciated.
Thanks,
Abhishek

Answer 1

Hello Sarvjeet,
I'd to write a UDF in message mapping to identify duplicate files and throw an exception. In my case, I had to compare with the file load directory (source directory) with the archive directory to identify whether the new file is a duplicate or not. I'm not sure if this is the same case with you. See if below helps: (I used parameterized mapping to input the file locations in integration directory rather than hard-coding it in the mapping)
AbstractTrace trace;
    trace = container.getTrace();
    double archiveFileSize = 0;
    double newFileSizeDouble = Double.parseDouble(newFileSize);
    String archiveFile = "";
    String archiveFileTrimmed = "";
    int var2 = 0;
    File directory = new File(directoryName);
    File[] fList = directory.listFiles();
    Arrays.sort(fList, Collections.reverseOrder());
    // Traversing through all the files
    for (File file : fList){   
        // If the directory element is a file
        if (file.isFile()){       
                        trace.addInfo("Filename: " + file.getName()+ ":: Archive File Time: "+ Long.toString(file.lastModified()));
                        archiveFile = file.getName();
                      archiveFileTrimmed = archiveFile.substring(20);       
                      archiveFileSize = file.length();
                        if (archiveFileTrimmed.equals(newFile) && archiveFileSize == newFileSizeDouble ) {
                                var2 = var2 + 1;
                                trace.addInfo("Duplicate File Found."+newFile);
                                if (var2 == 2) {
                                        break;
                        else {
                                continue;
    if (var2 == 2) {
        var2 = 0;
        throw new StreamTransformationException("Duplicate File Found. Processing for the current file is stopped. File: "+newFile+", File Size: "+newFileSize);
return Integer.toString(var2);
Regards,
Abhishek