code: public static synchronized void closeCCMConnection(String poolName, Object mcp, Object cl,
                                                        Object connection, String key)
     {
        log.tracef("%s", new TraceEvent(poolName,
                                        Integer.toHexString(System.identityHashCode(mcp)),
                                        TraceEvent.CLOSE_CCM_CONNECTION,
                                        Integer.toHexString(System.identityHashCode(cl)),
                                        Integer.toHexString(System.identityHashCode(connection)),
                                        key));
     }
docs: Close CCM connection
  @param poolName The name of the pool
  @param mcp The managed connection pool
  @param cl The connection listener
  @param connection The connection
  @param key The frame key