private boolean getByteArrValZeroLnth(String key, Region region) {
    Object val0 = null;
    byte[] val2 = new byte[0];
    try {
      val0 = region.get(key);
    } catch (Exception ex) {
      ex.printStackTrace();
      fail("Failed to get the value on disk");
    }
    // verify that the retrieved byte[] equals to the value put initially.
    boolean result = false;
    byte[] x = null;
    x = (byte[]) val0;
    // verify that the value of the entry is an instance of byte []
    assertTrue("the value of the entry having key 119 is NOT an" + " instance of byte []",
        val0 instanceof byte[]);

    result = x.length == val2.length;

    if (!result) {
      fail("The lenghth of byte[] put at 119th key obtained from disk "
          + "is not euqal to the lenght of byte[] put initially");
    }
    return result;
  }
to validate the get operation performed on a byte array of length zero
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/DiskRegRecoveryJUnitTest.java