apache/hadoop · error · UnsupportedOperationException

{} doesn't support getAllStoragePolicies

Error message

{} doesn't support getAllStoragePolicies

What it means

Error "{} doesn't support getAllStoragePolicies" thrown in apache/hadoop.

Source

Thrown at hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java:3428

   *         (default outcome).
   */
  public BlockStoragePolicySpi getStoragePolicy(final Path src)
      throws IOException {
    throw new UnsupportedOperationException(getClass().getSimpleName()
        + " doesn't support getStoragePolicy");
  }

  /**
   * Retrieve all the storage policies supported by this file system.
   *
   * @return all storage policies supported by this filesystem.
   * @throws IOException IO failure
   * @throws UnsupportedOperationException if the operation is unsupported
   *         (default outcome).
   */
  public Collection<? extends BlockStoragePolicySpi> getAllStoragePolicies()
      throws IOException {
    throw new UnsupportedOperationException(getClass().getSimpleName()
        + " doesn't support getAllStoragePolicies");
  }

  /**
   * Get the root directory of Trash for current user when the path specified
   * is deleted.
   *
   * @param path the trash root of the path to be determined.
   * @return the default implementation returns {@code /user/$USER/.Trash}
   */
  public Path getTrashRoot(Path path) {
    return this.makeQualified(new Path(getHomeDirectory().toUri().getPath(),
        TRASH_PREFIX));
  }

  /**
   * Get all the trash roots for current user or all users.
   *

View on GitHub (pinned to 2add963021)

Solutions

1. Call getAllStoragePolicies only on a DistributedFileSystem instance.
2. Cast/check the FileSystem type before invoking this HDFS-specific API.

When it happens

Trigger: Thrown at hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java:3428 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/5ab5f1a4d981e6a7. Report an issue: GitHub.