public void pruneOldExceptions() {
    Set<T> members;
    members = new HashSet<>(memberToGCVersion.keySet());

    for (T member : members) {
      Long gcVersion = memberToGCVersion.get(member);

      RegionVersionHolder<T> holder;
      holder = memberToVersion.get(member);

      if (holder != null && gcVersion != null) {
        synchronized (holder) {
          holder.removeExceptionsOlderThan(gcVersion);
        }
      }
    }

    localExceptions.removeExceptionsOlderThan(localGCVersion.get());
  }
Remove an exceptions that are older than the current GC version for each member in the RVV.
geode-core/src/main/java/org/apache/geode/internal/cache/versions/RegionVersionVector.java