wro4j-core/src/main/java/ro/isdc/wro/model/resource/support/change/ResourceWatcher.java
protected void onException(final Exception e) {
    // not using ERROR log intentionally, since this error is not that important
    LOG.info("Could not check for resource changes because: {}", e.getMessage());
    LOG.debug("[FAIL] detecting resource change ", e);
  }
protected void onException(final Exception e) {
    // not using ERROR log intentionally, since this error is not that important
    LOG.info("Could not check for resource changes because: {}", e.getMessage());
    LOG.debug("[FAIL] detecting resource change ", e);
  }
Invoked when exception occurs.