public Set<InternalDistributedMember> getRegionDestroyedMembers(String regionFullPath) {
      Set<InternalDistributedMember> members = regionExceptions.get(regionFullPath);
      if (members == null) {
        members = Collections.emptySet();
      }
      return members;
    }
Mark peers as offline that returned a cache closed exception
geode-core/src/main/java/org/apache/geode/internal/cache/TXCommitMessage.java