apache/hadoop · error · IllegalArgumentException

Invalid Arguments found.

Error message

Invalid Arguments found.

What it means

Error "Invalid Arguments found." thrown in apache/hadoop.

Source

Thrown at hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/diskbalancer/command/Command.java:371

    @SuppressWarnings("unchecked")
    Iterator<Option> iter = cmd.iterator();
    while (iter.hasNext()) {
      Option opt = iter.next();

      if (!validArgs.containsKey(opt.getLongOpt())) {
        String errMessage = String
            .format("%nInvalid argument found for command %s : %s%n",
                commandName, opt.getLongOpt());
        StringBuilder validArguments = new StringBuilder();
        validArguments.append(String.format("Valid arguments are : %n"));
        for (Map.Entry<String, String> args : validArgs.entrySet()) {
          String key = args.getKey();
          String desc = args.getValue();
          String s = String.format("\t %s : %s %n", key, desc);
          validArguments.append(s);
        }
        LOG.error(errMessage + validArguments.toString());
        throw new IllegalArgumentException("Invalid Arguments found.");
      }
    }
  }

  /**
   * Gets cluster URL.
   *
   * @return - URL
   */
  public URI getClusterURI() {
    return clusterURI;
  }

  /**
   * Set cluster URL.
   *
   * @param clusterURI - URL
   */

View on GitHub (pinned to 2add963021)

Solutions

1. Run the diskbalancer command with --help and correct the invalid or missing arguments.
2. Check for typos in option names and values.

When it happens

Trigger: DiskBalancer command line parsing when unknown or malformed arguments are supplied.

Common situations: See trigger scenarios.

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/19c5af5902e27956. Report an issue: GitHub.