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Gary D. Gregory commented on IO-856: ------------------------------------ Hello [~thomas.hart...@gmail.com] Thank you for your report. Please specify: * What OS? * What Java version? > ListFiles should not fail on vanishing files > -------------------------------------------- > > Key: IO-856 > URL: https://issues.apache.org/jira/browse/IO-856 > Project: Commons IO > Issue Type: Bug > Components: Utilities > Affects Versions: 2.16.1 > Reporter: Thomas Hartwig > Assignee: Gary D. Gregory > Priority: Major > > ListFiles crashes when vanishing files are involved while listing, ListFiles > should simply list, the application should care of if files are not existent > any more: > <pre> > java.io.UncheckedIOException: java.nio.file.NoSuchFileException: > /tmp/20b50a15-b84e-4a9a-953e-223452dac994/a914fa55-50f7-4de0-8ca6-1fd84f10b29a.png > at > java.base/java.nio.file.FileTreeIterator.fetchNextIfNeeded(FileTreeIterator.java:87) > at > java.base/java.nio.file.FileTreeIterator.hasNext(FileTreeIterator.java:103) > at java.base/java.util.Iterator.forEachRemaining(Iterator.java:132) > at > java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1845) > at > java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) > at > java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) > at > java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) > at > java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) > at > java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) > at > org.apache.commons.io@2.16.1/org.apache.commons.io.FileUtils.toList(FileUtils.java:3025) > at > org.apache.commons.io@2.16.1/org.apache.commons.io.FileUtils.listFiles(FileUtils.java:2314) > at com.itth.test/test.ApacheBug.lambda$main$1(ApacheBug.java:39) > at java.base/java.lang.Thread.run(Thread.java:842) > Caused by: java.nio.file.NoSuchFileException: > /tmp/20b50a15-b84e-4a9a-953e-223452dac994/a914fa55-50f7-4de0-8ca6-1fd84f10b29a.png > at > java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:92) > at > java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:106) > at > java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111) > at > java.base/sun.nio.fs.UnixFileAttributeViews$Basic.readAttributes(UnixFileAttributeViews.java:55) > at > java.base/sun.nio.fs.UnixFileSystemProvider.readAttributes(UnixFileSystemProvider.java:148) > at > java.base/sun.nio.fs.LinuxFileSystemProvider.readAttributes(LinuxFileSystemProvider.java:99) > at java.base/java.nio.file.Files.readAttributes(Files.java:1851) > at > java.base/java.nio.file.FileTreeWalker.getAttributes(FileTreeWalker.java:226) > at java.base/java.nio.file.FileTreeWalker.visit(FileTreeWalker.java:277) > at java.base/java.nio.file.FileTreeWalker.next(FileTreeWalker.java:374) > at > java.base/java.nio.file.FileTreeIterator.fetchNextIfNeeded(FileTreeIterator.java:83) > ... 12 more > </pre> > Use this to reproduce: > <pre> > package test; > import org.apache.commons.io.FileUtils; > import java.io.BufferedOutputStream; > import java.io.File; > import java.io.FileOutputStream; > import java.io.IOException; > import java.nio.charset.StandardCharsets; > import java.nio.file.Path; > import java.util.Collection; > import java.util.UUID; > public class ApacheBug { > public static void main(String[] args) { > // create random directory in tmp, create the directory if it does not exist > final File dir = FileUtils.getTempDirectory(); > if (!dir.exists()) { > if (!dir.mkdirs()) { > throw new RuntimeException("could not create image file path: " + > dir.getAbsolutePath()); > } > } > // create random file in the directory > new Thread(() -> { > try { > while (true) { > final File file = Path.of(dir.getAbsolutePath(), UUID.randomUUID().toString() > + ".png").toFile(); > new BufferedOutputStream(new > FileOutputStream(file)).write("TEST".getBytes(StandardCharsets.UTF_8)); > file.delete(); > } > } catch (IOException e) { > e.printStackTrace(); > } > }).start(); > new Thread(() -> { > try { > while (true) { > final Collection<File> files = FileUtils.listFiles(dir, new String[]\{"png"}, > true); > System.out.println(files.size()); > } > } catch (Exception e) { > e.printStackTrace(); > } > }).start(); > try { > Thread.sleep(10000); > } catch (InterruptedException e) { > Thread.currentThread().interrupt(); > } > } > } > </pe> > -- This message was sent by Atlassian Jira (v8.20.10#820010)