@Override
  public void releaseGIIPermit() {
    stats.incInitialImageRequestsInProgress(-1);
    parallelGIIs.release();
  }
This is an event reflecting that a InternalDistributedMember may be missing but has not yet
left the system.
geode-core/src/main/java/org/apache/geode/distributed/internal/ClusterDistributionManager.java