[jira] [Created] (PDFBOX-6120) PreflightParser .validate leads to "Too many open files"

["Théo Lenoble (Jira)" <ji...@apache.org>]

Théo Lenoble created PDFBOX-6120:
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             Summary: PreflightParser .validate leads to "Too many open files"
                 Key: PDFBOX-6120
                 URL: https://issues.apache.org/jira/browse/PDFBOX-6120
             Project: PDFBox
          Issue Type: Bug
          Components: Preflight
    Affects Versions: 3.0.6 PDFBox
            Reporter: Théo Lenoble


Hi from France,
Hope my english will be clear enough to explain what we encounter :D

We use org.apache.pdfbox:preflight:3.0.6, calling static method PreflightParser.validate we encounter "Too many open files" issues.

We solved it locally by extending PreflightParser, implementing Closeable interface and overriding validate function.

Exemple of our solution :
```java
public class CustomPreflightParser extends PreflightParser implements Closeable {
  public static ValidationResult validate(File file) throws IOException {
    ValidationResult result;
    try(
      // we move PreflightParser initialisation here
      CustomPreflightParser parser = new CustomPreflightParser(file);
      PreflightDocument document = (PreflightDocument) parser.parse()
    ) {
      result = document.validate();
    }
    catch (SyntaxValidationException e)
    {
      result = e.getResult();
    }
    return result;
  }


  @Override
  public void close() {
    IOUtils.closeQuietly( this.source );
    IOUtils.closeQuietly( this.document );
    // May be missing close ressources, seems to be enought for us
  }
}
```

We didn't spend more time on it so may be there is a better solution ?
We wanted to share it with you in case you validate the issue and provide a proper fix.
And may be it could help other to avoid having the same issue (or have a quick imperfect solution).

Hope this could help :)
Regards,
Théo Lenoble



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