v7 Static (Default) route inactive after high load

Hello,

I experience a problem with RouterOS v7.

We have multiple Full BGP Feeds and some peering.

After high CPU load, for example this morning one of our full BGP transit having an outage, so the router become bussy to remove the routes from this transit, the default static route (which point to another provider) stops working and became inactive, we also have a second default route to another route with as back-up but this also not become active on such moment.

A reboot is needed te become active again.

Router: CCR1072
Firmware: V7.1.3

Little additional information.

We haven’t experience this problem on our second BGP router for now, this is a CCR2004 also running v7.1.3

I have got the same problem.

Time to time the static route to my gateway become inactive only reboot helps.
At that time one random cpu are become 100% busy.
Also there is no response in the terminal window for /routing/stats/process> print
Looks like all routing process are hung.

ROS version 7.15.2 on RB4011iGS+5HacQ2HnD.
I suppose I have not seen such behavior on versions prior 7.15
I use a lot of routes recived by BGP up to 150K for routing table ‘vpn’ and several static and dynamically created routes for table ‘main’

What other information can help someone to say what is going on with my ROS !?

current output when everything fine.

[admin@Router] /routing/stats/process> print
Columns: TASKS, PRIVATE-MEM-BLOCKS, SHARED-MEM-BLOCKS, PSS, RSS, VMS, RETIRED, ID, PID, RPID, PROCESS-TIME, KERNEL-TIME, CUR-BUSY, MAX-BUSY, CUR-CALC, MAX-CALC
 # TASKS                         PRIVATE-MEM-BLOCKS  SHARED-MEM-BLOCKS  PSS        RSS        VMS      RETIRED  ID            PID  RPID  PROCESS-TIME  KERNEL-TIME  CUR-BUSY  MAX-BUSY  CUR-CALC  MAX-CALC
 0 routing tables                4352.0KiB           6.5MiB             4.8MiB     11.1MiB    41.4MiB       11  main          124     0  6s400ms       3s680ms      20ms      1s130ms   20ms      1m20ms  
   rib                                                                                                                                                                                                    
 1 fib                           768.0KiB            0                  2121.0KiB  8.3MiB     41.4MiB           fib           140     1  2s400ms       2s420ms                4s900ms             4s900ms 
 2 routing policy configuration  768.0KiB            768.0KiB           736.0KiB   2980.0KiB  41.4MiB           policy        141     1  390ms         440ms                  60ms                60ms    
 3 configuration and reporting   2304.0KiB           1024.0KiB          3185.0KiB  9.4MiB     41.4MiB           static        142     1  1m13s10ms     710ms                  470ms               59s920ms
 4 BFD service                   256.0KiB            0                  602.0KiB   2712.0KiB  41.4MiB           bfd           143     1  150ms         370ms                  70ms                70ms    
 5 ospf                          256.0KiB            256.0KiB           626.0KiB   2816.0KiB  41.4MiB           ospf          144     1  250ms         250ms                  70ms                70ms    
 6 pimsm                         256.0KiB            0                  631.0KiB   2844.0KiB  41.4MiB           pim           146     1  270ms         200ms                  10ms                10ms    
 7 ldp                           256.0KiB            256.0KiB           1530.0KiB  7.8MiB     41.4MiB           mpls          147     1  2s470ms       280ms                  2s210ms             2s210ms 
 8 rip                           256.0KiB            0                  621.0KiB   2776.0KiB  41.4MiB           rip           148     1  260ms         240ms                  20ms                20ms    
 9 BGP service                   512.0KiB            0                  1122.0KiB  3592.0KiB  41.4MiB           bgp           149     1  1s270ms       520ms                  10ms                10ms    
10 fantasy                       256.0KiB            0                  590.0KiB   2624.0KiB  41.4MiB           fantasy       150     1  240ms         180ms                  10ms                10ms    
11 isis                          256.0KiB            0                  618.0KiB   2712.0KiB  41.4MiB           12            145     1  210ms         210ms                  10ms                10ms    
12 BGP Input *.*.*.*         1024.0KiB           768.0KiB           18.8MiB    25.4MiB    41.4MiB           bgp-remote-1  257     1  6s580ms       1s150ms                140ms               140ms   
   BGP Output *.*.*.*
13 BGP Input *.*.*.*        1024.0KiB           768.0KiB           2260.0KiB  8.7MiB     41.4MiB           bgp-remote-2  270     1  1s730ms       210ms                  150ms               150ms   
   BGP Output *.*.*.*