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/*
 * This class defines an immutable universally unique identifier (UUID). It represents a 128-bit value.
 * More specifically, the random UUIDs in this class are variant 2 (Leach-Salz) version 4 UUIDs.
 * This definition is very similar to java.util.UUID. One notable difference is that the toString() method prints
 * using the base64 string encoding.
 */
public class UUID {
  /**
   * A UUID where all bits are zero. It represents a null or empty UUID.
   */
  public static final UUID ZERO_UUID

  /**
   * Returns the most significant bits of the UUID's 128 bit value.
   */
  public long getMostSignificantBits()

  /**
   * Returns the least significant bits of the UUID's 128 bit value.
   */
  public long getLeastSignificantBits()

  /**
   * Returns true iff obj is another UUID with the same value.
   */
  public boolean equals(Object obj)

  /**
   * Returns a hash code for this UUID
   */
  public int hashCode()

  /**
   * Returns a base64 string encoding of the UUID.
   */
  public String toString() 
  
}

Additionally, it may be dangerous to use older versions of Kafka tools with new broker versions when using their --zookeeper flags. Use of older tools in this way is not supported today.

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