Hello Jay,
Thank you for using Wazuh!
From the logs you shared, it seems there is no more space on the node where your Wazuh indexer is deployed as I can see the entry
-> /var/lib/wazuh-indexer/nodes/0/_state/segments_2oh9: No space left on device. You can reverify the free space on the node by running the command
df -H and if it is low on storage, you will need to add more storage to it and restart the Wazuh indexer service with command
systemctl restart wazuh-indexer.
I hope this helps. Do not hesitate to reach out again if you have any other query.
Best Regards.