apache/hadoop · error · SnapshotException

Failed to gcDeletedSnapshot {} from {}: snapshot is not mark

Error message

Failed to gcDeletedSnapshot {} from {}: snapshot is not marked as deleted

What it means

Error "Failed to gcDeletedSnapshot {} from {}: snapshot is not marked as deleted" thrown in apache/hadoop.

Source

Thrown at hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/SnapshotManager.java:337

      throws IOException {
    final String path = iip.getPath();
    final INodeDirectory dir = INodeDirectory.valueOf(iip.getLastINode(), path);
    if (!dir.isSnapshottable()) {
      throw new SnapshotException(
          "Directory is not a snapshottable directory: " + path);
    }
    return dir;
  }

  public void assertMarkedAsDeleted(INodesInPath iip, String snapshotName)
      throws IOException {
    final INodeDirectory dir = getSnapshottableRoot(iip);
    final Snapshot.Root snapshotRoot = dir.getDirectorySnapshottableFeature()
        .getSnapshotByName(dir, snapshotName)
        .getRoot();

    if (!snapshotRoot.isMarkedAsDeleted()) {
      throw new SnapshotException("Failed to gcDeletedSnapshot "
          + snapshotName + " from " + dir.getFullPathName()
          + ": snapshot is not marked as deleted");
    }
  }

  void assertPrior(INodeDirectory dir, String snapshotName, int prior)
      throws SnapshotException {
    if (!isSnapshotDeletionOrdered()) {
      return;
    }
    // prior must not exist
    if (prior != Snapshot.NO_SNAPSHOT_ID) {
      throw new SnapshotException("Failed to removeSnapshot "
          + snapshotName + " from " + dir.getFullPathName()
          + ": Unexpected prior (=" + prior + ") when "
          + DFS_NAMENODE_SNAPSHOT_DELETION_ORDERED
          + " is " + isSnapshotDeletionOrdered());
    }

View on GitHub (pinned to 2add963021)

Solutions

1. Ensure the snapshot was actually deleted (marked for deletion) before requesting GC of the deleted snapshot.

When it happens

Trigger: Garbage collection is requested for a snapshot that is not marked as deleted.

Common situations: Internal snapshot GC running against a snapshot whose deletion did not complete or was reverted.

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/0b7288233ee7ed0c. Report an issue: GitHub.