File connector: Some file listing loop runs might be skipped

[pdolif]

The FileListingThread runs an infinite loop with a configurable polling interval for performing file listings. When an interval of 100ms is configured, I would expect that performListing() is invoked approximately every 100ms. However, it seems to run every 200ms only.

Steps to reproduce

Run the following test and add a log statement inside FileListingThread when performListing() is called.

@Test
public void pollingIntervalTest() throws IOException {
    Map<String, Object> map = new HashMap<>();
    map.put("inputDirectory", directory.toString());
    map.put("pollingInterval", 100);

    try {
        listingThread = new FileListingThread(FileSourceConfig.load(map), workQueue, inProcess, recentlyProcessed);
        executor.execute(listingThread);

        generateFiles(1);

        Thread.sleep(5000);
    } catch (InterruptedException | ExecutionException e) {
        fail("Unable to generate files" + e.getLocalizedMessage());
    } finally {
        cleanUp();
    }
}

The log output shows that performListing() is executed approximately every 200ms:

2026-04-04T12:01:04,938+0200 INFO  [pool-2-thread-1] o.a.p.i.f.FileListingThread - Perform file listing
2026-04-04T12:01:05,139+0200 INFO  [pool-2-thread-1] o.a.p.i.f.FileListingThread - Perform file listing
2026-04-04T12:01:05,339+0200 INFO  [pool-2-thread-1] o.a.p.i.f.FileListingThread - Perform file listing
2026-04-04T12:01:05,539+0200 INFO  [pool-2-thread-1] o.a.p.i.f.FileListingThread - Perform file listing

Are you willing to submit a PR?

• I'm willing to submit a PR!