apache/hadoop · error · InvalidRequestException

No pool specified.

Error message

No pool specified.

What it means

Error "No pool specified." thrown in apache/hadoop.

Source

Thrown at hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/CacheManager.java:370

      throw new IOException("No more available IDs.");
    }
    return nextDirectiveId++;
  }

  // Helper getter / validation methods

  private static void checkWritePermission(FSPermissionChecker pc,
      CachePool pool) throws AccessControlException {
    if ((pc != null)) {
      pc.checkPermission(pool, FsAction.WRITE);
    }
  }

  private static String validatePoolName(CacheDirectiveInfo directive)
      throws InvalidRequestException {
    String pool = directive.getPool();
    if (pool == null) {
      throw new InvalidRequestException("No pool specified.");
    }
    if (pool.isEmpty()) {
      throw new InvalidRequestException("Invalid empty pool name.");
    }
    return pool;
  }

  private static String validatePath(CacheDirectiveInfo directive)
      throws InvalidRequestException {
    if (directive.getPath() == null) {
      throw new InvalidRequestException("No path specified.");
    }
    String path = directive.getPath().toUri().getPath();
    if (!DFSUtil.isValidName(path)) {
      throw new InvalidRequestException("Invalid path '" + path + "'.");
    }
    return path;
  }

View on GitHub (pinned to 2add963021)

Solutions

1. Specify a cache pool name for the directive with the -pool option of hdfs cacheadmin.

When it happens

Trigger: addCacheDirective without specifying a cache pool name.

Common situations: See trigger scenarios.

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/edf79e129696ddaa. Report an issue: GitHub.