Undesired UI Windows Appearing when using Programmatically

[cgivre]

Hello All, Firstly, thank you VERY much for publishing this amazing library! I am working on an integration with Apache Drill which enables users to query PDF files directly using SQL. I'm about 80% done and really impressed with how well Tabula works for this.

However, when I execute the first Drill query that uses the Tabula libraries a Java icon pops up and I get the following text in the command line:

2020-10-25 15:06:55.770 java[71188:7121498] Persistent UI failed to open file file://localhost/Users/******/Saved%20Application%20State/net.java.openjdk.cmd.savedState/window_1.data: Permission denied (13)

I changed the permissions on that directory but I'm still getting the Java popup.

This is not normal behavior for Drill and my goal here was to integrate Tabula programmatically. Is Tabula trying to open a window or something like that and if so, is there a way to disable this? I noted that this does not occur in my unit tests.

Here are some relevant code snippets:

 public static List<Table> extractTablesFromPDF(PDDocument document, ExtractionAlgorithm algorithm) {
    NurminenDetectionAlgorithm detectionAlgorithm = new NurminenDetectionAlgorithm();

    ExtractionAlgorithm algExtractor;

    SpreadsheetExtractionAlgorithm extractor=new SpreadsheetExtractionAlgorithm();

    ObjectExtractor objectExtractor = new ObjectExtractor(document);
    PageIterator pages = objectExtractor.extract();
    List<Table> tables= new ArrayList<>();
    while (pages.hasNext()) {
      Page page = pages.next();

      algExtractor = algorithm;
      /*if (extractor.isTabular(page)) {
        algExtractor=new SpreadsheetExtractionAlgorithm();
      }
      else {
        algExtractor = new BasicExtractionAlgorithm();
      }*/

      List<Rectangle> tablesOnPage = detectionAlgorithm.detect(page);

      for (Rectangle guessRect : tablesOnPage) {
        Page guess = page.getArea(guessRect);
        tables.addAll(algExtractor.extract(guess));
      }
    }
    return tables;
  }