中午，公司群里面测试人员@笔者说，早上测试服务器异常，MQ起不来，重启os了也起不来，报错，上去看下了早上又因为内存oom被内核killed了，启动了下，确实启动报错，erl vm进程起来了，但是beam.smp进程没有起来，看下了MQ启动日志startup_log，有如下信息：

=INFO REPORT==== 10-Dec-2016::11:43:03 ===Error description:   {could_not_start,rabbit,       {
   {badmatch,            {error,                {
   {
   {badmatch,                      {error,                          {not_a_dets_file,                              "/var/lib/rabbitmq/mnesia/rabbit@iZ23nn1p4mjZ/recovery.dets"}}},                  [{rabbit_recovery_terms,open_table,0,[]},                   {rabbit_recovery_terms,init,1,[]},                   {gen_server,init_it,6,[{file,"gen_server.erl"},{line,328}]},                   {proc_lib,init_p_do_apply,3,                       [{file,"proc_lib.erl"},{line,240}]}]},                 {child,undefined,rabbit_recovery_terms,                     {rabbit_recovery_terms,start_link,[]},                     transient,4294967295,worker,                     [rabbit_recovery_terms]}}}},        [{rabbit_queue_index,start,1,[]},         {rabbit_variable_queue,start,1,[]},         {rabbit_priority_queue,start,1,[]},         {rabbit_amqqueue,recover,0,[]},         {rabbit,recover,0,[]},         {rabbit,'-run_step/2-lc$^1/1-1-',1,[]},         {rabbit,run_step,2,[]},         {rabbit,'-run_boot_steps/1-lc$^0/1-0-',1,[]}]}}Log files (may contain more information):   /var/log/rabbitmq/rabbit@iZ23nn1p4mjZ.log   /var/log/rabbitmq/rabbit@iZ23nn1p4mjZ-sasl.log

初步查了下，应该是recovery.dets文件损坏的问题所致，发现该文件的大小为0，删除该文件后，问题解决。