Blog by Murugan

License slaves report usage every minute to the manager. After 72+ hours of no contact, a slave violates and blocks searches but allows indexing. Users can't search the violating slave until it reconnects with the manager.

The Data from the source will not be forwarded to the indexer. As soon as the forwarder comes up, it will continue the streaming of data.

Deployment clients (e.g., forwarders) cannot fetch app updates or checksums. Forwarders operate normally but cannot receive new configurations until the server is restored, impacting deployment of updates.

No major issues to the environment's data flow. searches will work normally; indexing will happen as usual. The only issue is the admin or whoever was using the Monitoring Console to track and monitor the health of Splunk Environment, will lose the visibility.

You cannot push new configurations to the members. • A member that joins or rejoins the cluster, or restarts, cannot pull the latest set of apps tar balls.

This will show nothing to users, probably user will get “The site can’t be reached” or “502 Bad Gateway” error when they try to access the Instances URL or the Load balancer URL. Peers can continue ingesting the data as they are not dependent on the search heads.

If a majority of members fail, the cluster may be unable to elect a new captain, resulting in cluster failure. To ensure continuity, configure the remaining member as a static captain to maintain operational stability despite the loss of majority nodes.

Search artifacts from the failed member remain accessible through other search heads. With only 2 nodes, if the failed member was the captain, configuring one as a Static captain and the other as a member ensures seamless functionality and ongoing operational stability.

The Cluster Master shows all members as down, indicating the cluster's inactive status. Search heads cannot retrieve data, as no Indexers can process queries. Forwarders accumulate data, causing increased queues until Indexers are restored, impacting data flow and system performance.

- Searches may return incomplete results until all bucket copies on surviving Indexers are made searchable. - The Cluster Master directs surviving peers to make all available bucket copies searchable, including promoting them to primary copies by indexing raw data.

- Searches can continue but may yield partial results until the cluster is fully operational. - Bucket-fixing (repairing data sets) is managed by the Cluster Master once it's restored. - Replication to and from the offline peer stops until it reconnects, impacting data consistency and redundancy.

Indexers and search heads operate normally but can't perform cluster management tasks. Search heads warn of peer node issues. No coordination for bucket fixes if peers are down. Forwarders can't forward data without cluster info, risking data loss.