org.elasticsearch.indices.recovery.RecoveryTarget#restoreFileFromSnapshot does not check for cancellation during the download of a file. This means that if a recovery is cancelled mid-way, we will still not release the store/shard-lock until the file is fully downloaded.
For large files or slow downloads this can lead to problems when the shard is (re-)allocated to a node that is still executing such an interrupted recovery.

-> we need to add some checks for cancellation here like we have for other recovery modes.
x-pack/plugin/snapshot-based-recoveries/src/internalClusterTest/java/org/elasticsearch/xpack/snapshotbasedrecoveries/recovery/SnapshotBasedIndexRecoveryIT.java
public class SnapshotBasedIndexRecoveryIT extends AbstractSnapshotIntegTestCase {
    @Override
    protected Collection<Class<? extends Plugin>> nodePlugins() {
        return Arrays.asList(
            ConfigurableMockSnapshotBasedRecoveriesPlugin.class,
            TestRepositoryPlugin.class,
            MockTransportService.TestPlugin.class,
            InternalSettingsPlugin.class
        );
    }
    @After
    public void clearRepoDelegate() {
        FilterFsRepository.clearReadBlobWrapper();
    }
    public static class TestRepositoryPlugin extends Plugin implements RepositoryPlugin {