/// <summary>
/// Check if the given INode (or one of its descendants) is snapshottable and
/// already has snapshots.
/// </summary>
/// <param name="target">The given INode</param>
/// <param name="snapshottableDirs">
/// The list of directories that are snapshottable
/// but do not have snapshots yet
/// </param>
/// <exception cref="Org.Apache.Hadoop.Hdfs.Protocol.SnapshotException"/>
internal static void CheckSnapshot(INode target, IList <INodeDirectory> snapshottableDirs
)
{
if (target.IsDirectory())
{
INodeDirectory targetDir = target.AsDirectory();
DirectorySnapshottableFeature sf = targetDir.GetDirectorySnapshottableFeature();
if (sf != null)
{
if (sf.GetNumSnapshots() > 0)
{
string fullPath = targetDir.GetFullPathName();
throw new SnapshotException("The directory " + fullPath + " cannot be deleted since "
+ fullPath + " is snapshottable and already has snapshots");
}
else
{
if (snapshottableDirs != null)
{
snapshottableDirs.AddItem(targetDir);
}
}
}
foreach (INode child in targetDir.GetChildrenList(Org.Apache.Hadoop.Hdfs.Server.Namenode.Snapshot.Snapshot
.CurrentStateId))
{
CheckSnapshot(child, snapshottableDirs);
}
}
}
private void CheckStoragespace(INodeDirectory dir, long computed)
{
if (-1 != quota.GetStorageSpace() && usage.GetStorageSpace() != computed)
{
NameNode.Log.Error("BUG: Inconsistent storagespace for directory " + dir.GetFullPathName
() + ". Cached = " + usage.GetStorageSpace() + " != Computed = " + computed);
}
}