Adar Dembo created KUDU-2912:
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Summary: Document zero-downtime workflow for 'forgetting' dead
tservers
Key: KUDU-2912
URL: https://issues.apache.org/jira/browse/KUDU-2912
Project: Kudu
Issue Type: Bug
Components: documentation
Affects Versions: 1.11.0
Reporter: Adar Dembo
This is a fairly useful workflow when the goal is to rebalance the cluster. All
it takes is one dead tserver (supposing it's decommissioned and long gone) for
rebalancing to refuse to run. As of 1.10.0 there's a CLI parameter that
instructs the rebalancer to ignore certain tservers, but it's annoying to put
together a UUID list when multiple tservers are dead.
Anyway, the zero-downtime workflow is:
# Restart all of the masters in the cluster one by one.
# After each restart, wait for the restarted master to load its tablet and join
consensus (ksck should be able to indicate when this was achieved).
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