If the following message appears in the Opensearch pod logs, the vm.max_map_count:
ERROR:  bootstrap checks failed
: max virtual memory areas vm.max_map_count  is too low, increase to at least 
On all control-plane and worker nodes the line "vm.max_map_count=262144" must be added to the file "/etc/sysctl.conf".
After that the following command must be executed in the console on all control-plane and worker nodes: sysctl -p
Finally, the Opensearch pods must be restarted.
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