protected void invalidateHostRoleCommandStatusSummaryCache(Long requestId) {
    if (!hostRoleCommandStatusSummaryCacheEnabled ) {
      return;
    }

    LOG.debug("Invalidating host role command status summary cache for request {} !", requestId);
    hrcStatusSummaryCache.invalidate(requestId);
  }
Invalidates the host role command status summary cache entry that corresponds to the given request.
@param requestId the key of the cache entry to be invalidated.
ambari-server/src/main/java/org/apache/ambari/server/orm/dao/HostRoleCommandDAO.java