apache/hadoop · error · HadoopIllegalArgumentException

Snapshot " + to + " should be newer than " + from

Error message

Snapshot " + to + " should be newer than " + from

What it means

Error "Snapshot " + to + " should be newer than " + from" thrown in apache/hadoop.

Source

Thrown at hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/DistCpSync.java:145

          snapshotDiffFs.getFileStatus(getSnapshotPath(snapshotDiffDir, from));

      final FileStatus toSnapshotStat =
          snapshotDiffFs.getFileStatus(getSnapshotPath(snapshotDiffDir, to));

      if (isRdiff()) {
        // If fromSnapshot isn't current dir then do a time check
        if (!from.equals("")
            && fromSnapshotStat.getModificationTime() < toSnapshotStat
            .getModificationTime()) {
          throw new HadoopIllegalArgumentException("Snapshot " + from
              + " should be newer than " + to);
        }
      } else {
        // If toSnapshot isn't current dir then do a time check
        if(!to.equals("")
            && fromSnapshotStat.getModificationTime() > toSnapshotStat
            .getModificationTime()) {
          throw new HadoopIllegalArgumentException("Snapshot " + to
              + " should be newer than " + from);
        }
      }
    } catch (FileNotFoundException nfe) {
      throw new InvalidInputException("Input snapshot is not found", nfe);
    }

    return true;
  }

  /**
   * Check if the source and target filesystems support snapshots.
   */
  private void checkFilesystemSupport(Path sourceDir, Path targetDir,
      FileSystem srcFs, FileSystem tgtFs) throws IOException {
    if (!srcFs.hasPathCapability(sourceDir,
        CommonPathCapabilities.FS_SNAPSHOTS)) {
      throw new UnsupportedOperationException(

View on GitHub (pinned to 2add963021)

Solutions

1. Pass the older snapshot as 'from' and the newer as 'to' for -diff.
2. Check snapshot names and creation order on the source.

When it happens

Trigger: -diff is given a 'to' snapshot older than the 'from' snapshot.

Common situations: See trigger scenarios.

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/053411a74b9d085a. Report an issue: GitHub.