public void setPdxIgnoreUnreadFields(boolean ignore) {
    pdxIgnoreUnreadFields = ignore;
    pdxIgnoreUnreadFieldsUserSet = true;
  }
This indicates if the pdxReadSerialized value is set by user. This is used during cache xml
parsing. The value set by user api overrides the value set in cache.xml value.
geode-core/src/main/java/org/apache/geode/internal/cache/CacheConfig.java