slot 空余，但是不会被全部用满 #16
Description
您好！
运行了一段时间，从今天早上10点开始，每台机器RUNING的任务一直维持在十来个个左右，机器负载不高，无论pending了多少个Job，RUNNIN的状态都维持在这个数值，不更多的计算服务器上分配了；
队列参数：RES_REQ: order[ut:mem] span[hosts=1]
运行了badmin reconfig ，状态依旧；
还请看一下这个现象，多谢~~~
mbatchd.log 最后的信息如下：
May 27 09:50:09 718 3 20 do_jobInfoReq: chanWrite_() failed, Connection reset by peer.
May 27 09:50:17 832 3 20 do_jobInfoReq: chanWrite_() failed, Connection reset by peer.
May 27 09:50:26 876 3 20 do_jobInfoReq: chanWrite_() failed, Connection reset by peer.
May 27 09:50:35 911 3 20 do_jobInfoReq: chanWrite_() failed, Connection reset by peer.
May 27 09:50:36 954 3 20 do_jobInfoReq: chanWrite_() failed, Connection reset by peer.
May 27 09:51:53 1041 3 20 do_jobInfoReq: chanWrite_() failed, Connection reset by peer.
May 27 09:54:43 2136 3 20 do_jobInfoReq: chanWrite_() failed, Connection reset by peer.
May 27 10:12:29 10780 3 20 do_jobInfoReq: chanWrite_() failed, Connection reset by peer.
May 27 10:12:43 11048 3 20 do_jobInfoReq: chanWrite_() failed, Connection reset by peer.
May 27 10:20:56 16716 3 20 do_jobInfoReq: chanWrite_() failed, Connection reset by peer.
May 27 11:30:19 6550 3 20 do_jobInfoReq: chanWrite_() failed, Connection reset by peer.
May 27 11:32:03 20832 3 20 do_jobInfoReq: chanWrite_() failed, Connection reset by peer.
May 27 11:39:36 24068 3 20 do_jobInfoReq: chanWrite_() failed, Connection reset by peer.
May 27 11:46:01 24199 3 20 do_jobInfoReq: chanWrite_() failed, Connection reset by peer.
May 27 11:46:18 26988 3 20 do_jobInfoReq: chanWrite_() failed, Connection reset by peer.
May 27 13:22:48 5795 3 20 do_jobInfoReq: chanWrite_() failed, Connection reset by peer.
May 27 13:37:03 12223 3 20 do_jobInfoReq: chanWrite_() failed, Connection reset by peer.