Are you using Mellanox OFED Driver and if so what version? (#ofed_info | head -1) or are you using the Inbox driver embedded within the OS?
The boot log file attached does not contain the Kernel Trace upon crashing.
If this is an Infiniband Network, cable "MC2206130" is a Mellanox® passive copper cable, IB QDR/FDR10, 40Gb/s, QSFP and cable "MC2210130" is a Mellanox Passive Copper cable, 40Gb/s, QSFP only (No VPI).
1) Confirm the IB fabric health: (run this utility and options while the cluster is active)
#ibdiagnet -r --pc -P all=1 --pm_pause_time 1200 -o /tmp/$(date +%Y%m%d)
Review the ibdiagnet.2 log file from the folder created.
2) The messages file should have reported a Kernel trace, review kernel trace and events prior to the system crashing.
3) Review the traffic pattern at the time of the issue.
4) Review if there were any other particular changes within your environment.