Method probeKey

src/HBaseClient.java:3709–3716

Returns a newly allocated key to probe, to check a region is online. Sometimes we need to "poke" HBase to see if a region is online or a table exists. Given a key, we prepend some unique suffix to make it a lot less likely that we hit a real key with our probe, as doing so might have some implicati

(final byte[] key)

   * AsyncHBase probes.
   */
  private static byte[] probeKey(final byte[] key) {
    final byte[] testKey = new byte[key.length + 64];
    System.arraycopy(key, 0, testKey, 0, key.length);
    System.arraycopy(PROBE_SUFFIX, 0,
                     testKey, testKey.length - PROBE_SUFFIX.length,
                     PROBE_SUFFIX.length);
    return testKey;
  }

  // ----------------------------------------------------------------- //
  // Code that manages connection and disconnection to Region Servers. //