@Override
  public void setSystemId(String systemId) {
    checkReadOnly();
    this.systemId = systemId;
    configChanged();
  }
Parses the XML configuration file that describes managed entities.

@throws AdminXmlException If a problem is encountered while parsing the XML file.
geode-core/src/main/java/org/apache/geode/admin/internal/DistributedSystemConfigImpl.java