apache/hadoop · error · IllegalArgumentException

Invalid vectored read strategy: {}

Error message

Invalid vectored read strategy: {}

What it means

Error "Invalid vectored read strategy: {}" thrown in apache/hadoop.

Source

Thrown at hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/enums/VectoredReadStrategy.java:75

   */
  public String getName() {
    return name;
  }

  /**
   * Parses a configuration value into a {@link VectoredReadStrategy}.
   * @param value configuration value
   * @return matching vectored read strategy
   * @throws IllegalArgumentException if the value is invalid
   */
  public static VectoredReadStrategy fromString(String value) {
    for (VectoredReadStrategy strategy : values()) {
      if (strategy.name().equalsIgnoreCase(value)
          || strategy.getName().equalsIgnoreCase(value)) {
        return strategy;
      }
    }
    throw new IllegalArgumentException("Invalid vectored read strategy: " + value);
  }
}

View on GitHub (pinned to 2add963021)

Solutions

1. Set fs.azure.vectored.read.strategy to a supported value such as 'largestfirst' or 'default'.
2. Check for typos in the strategy name in the configuration.

When it happens

Trigger: An unrecognized vectored read strategy name is configured for ABFS vectored reads.

Common situations: See trigger scenarios.

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/46fc18d881f815a4. Report an issue: GitHub.