Re: [Geotools-gt2-users] GeoTiffReader locks the file indefinitely?

[Viatcheslav S. <Via...@h-...>]

Hi Ian,

Been debugging, the stream (of type it.geosolutions.imageio.stream.eraf.EnhancedRandomAccessFile) remains not closed after call at org.geotools.gce.geotiff.GeoTiffReader#read():737
> pbjRead.add(maskOvrProvider.getSourceSpiProvider().getStream());
... where it is passed to JaI/ImageN

With best regards, Slava

________________________________
Von: Ian Turton <ijt...@gm...>
Gesendet: Donnerstag, 11. Dezember 2025 12:16
An: Viatcheslav Sysoltsev <Via...@h-...>
Cc: geo...@li... <geo...@li...>
Betreff: Re: [Geotools-gt2-users] GeoTiffReader locks the file indefinitely?

Sie erhalten nicht häufig E-Mails von ijt...@gm.... Erfahren Sie, warum dies wichtig ist<https://aka.ms/LearnAboutSenderIdentification>
I think that's the expected behaviour on a windows machine for any file opened in a program. The code clearly closes the input stream created from the file that is passed in so I don't think there is any reason GeoTools would be locking the file.

Ian

On Wed, 10 Dec 2025 at 17:31, Viatcheslav Sysoltsev <Via...@h-...<mailto:Via...@h-...>> wrote:
Hi everyone,

I'd like to ask if it is an intended behavior, that GeoTiffReader locks the file indefinitely? If yes, is there a way to read the file completely and "dispose" the reader and the lock?

A simple program to demonstrate:

import org.geotools.coverage.grid.GridCoverage2D;
import org.geotools.gce.geotiff.GeoTiffReader;
import org.junit.jupiter.api.Test;

import java.io.File;
import java.time.Duration;

class GeotiffReaderTest {
   @Test
   public void read() throws Exception {
       File file = new File("C:\\Projects\\tmp\\tmp2\\qwf 2_TH.tif");
       GeoTiffReader reader = new GeoTiffReader(file);
       GridCoverage2D grid = reader.read(null);
       Thread.sleep(Duration.ofSeconds(60));
   }
}
when run, it reads the file and sleeps for a minute. Until JVM exits, the tif file cannot be moved or deleted:

C:\Projects\tmp\tmp2>mv "qwf 2_TH.tif" "qwf 2_TH.tif2"
/usr/bin/mv: cannot move 'qwf 2_TH.tif' to 'qwf 2_TH.tif2': Device or resource busy

// the problem is reproducible with geotools 34.1 and 33.0

With best regards,
Viatcheslav Sysoltsev / Slava

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--
Ian Turton