private static byte[] getCRCChecksum(byte[] value) {
    CRC32 crc32 = new CRC32();
    crc32.update(value);
    long checksum = crc32.getValue();
    return Longs.toByteArray(checksum);
  }
Computes and returns the crc32 checksum of the input byte array.
@param value the input byte array.
@return the crc32 checksum of the byte array.
samza-core/src/main/java/org/apache/samza/zk/ZkMetadataStore.java