protected void invalidateHostRoleCommandStatusSummaryCache(Set<Long> requestIds) {
    for (Long requestId : requestIds) {
      if (null != requestId) {
        invalidateHostRoleCommandStatusSummaryCache(requestId);
      }
    }
  }
Invalidates the host role command status summary cache entry that
corresponds to each request.

@param requestIds
         the requests to invalidate
ambari-server/src/main/java/org/apache/ambari/server/orm/dao/HostRoleCommandDAO.java