gradle/gradle · error · OutputFileSnapshottingException

Cannot snapshot output property '%s'.

Error message

Cannot snapshot output property '%s'.

What it means

Error "Cannot snapshot output property '%s'." thrown in gradle/gradle.

Source

Thrown at platforms/core-execution/execution/src/main/java/org/gradle/internal/execution/impl/DefaultOutputSnapshotter.java:46

public class DefaultOutputSnapshotter implements OutputSnapshotter {
    private final FileCollectionSnapshotter fileCollectionSnapshotter;

    public DefaultOutputSnapshotter(FileCollectionSnapshotter fileCollectionSnapshotter) {
        this.fileCollectionSnapshotter = fileCollectionSnapshotter;
    }

    @Override
    public ImmutableSortedMap<String, FileSystemSnapshot> snapshotOutputs(UnitOfWork work, File workspace) {
        ImmutableSortedMap.Builder<String, FileSystemSnapshot> builder = ImmutableSortedMap.naturalOrder();
        work.visitOutputs(workspace, new OutputVisitor() {
            @Override
            public void visitOutputProperty(String propertyName, TreeType type, OutputFileValueSupplier value) {
                FileSystemSnapshot snapshot;
                try {
                    snapshot = fileCollectionSnapshotter.snapshot(value.getFiles());
                } catch (Exception ex) {
                    throw new OutputFileSnapshottingException(propertyName, ex);
                }
                builder.put(propertyName, snapshot);
            }
        });
        return builder.build();
    }
}

View on GitHub (pinned to 534f27719b)

Solutions

1. Snapshotting an output property failed. Check that the output files exist and are readable; see the nested cause.

When it happens

Trigger: Thrown at platforms/core-execution/execution/src/main/java/org/gradle/internal/execution/impl/DefaultOutputSnapshotter.java:46 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of gradle/gradle@534f27719b (2026-08-22). Data as JSON: /api/errors/8f4fe99888f6e4e3. Report an issue: GitHub.