@Override
    public void fromData(DataInput in) throws IOException, ClassNotFoundException {
      name = in.readUTF();
      address = in.readUTF();
      nameChanged = in.readBoolean();
      addressChanged = in.readBoolean();
    }
test putIfAbsent with failover & retry. This is bugs 42559 and 43640
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/ConcurrentMapOpsDUnitTest.java