private void ensureEventTrackerInitialization() {
    try {
      getEventTracker().waitOnInitialization();
    } catch (InterruptedException ie) {
      getCancelCriterion().checkCancelInProgress(ie);
      Thread.currentThread().interrupt();
    }
  }
Invoked when a primary bucket is demoted.
geode-core/src/main/java/org/apache/geode/internal/cache/BucketRegion.java