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