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https://issues.apache.org/jira/browse/HDDS-14593?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ivan Andika updated HDDS-14593:
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Summary: OM follower should trigger read failover if it is installing
snapshot (was: OM follower should trigger failover if it is installing
snapshot)
> OM follower should trigger read failover if it is installing snapshot
> ---------------------------------------------------------------------
>
> Key: HDDS-14593
> URL: https://issues.apache.org/jira/browse/HDDS-14593
> Project: Apache Ozone
> Issue Type: Sub-task
> Reporter: Ivan Andika
> Assignee: Ivan Andika
> Priority: Major
>
> When OM follower is installing snapshot, its appliedIndex will not advance
> until the snapshot is installed (i.e. OM DB is fully downloaded from the OM
> leader to the OM follower). This can cause all linearizable follower read on
> this node to timeout due to the client timeout (default is 3s).
> Instead of waiting until the client timeout, OM follower can check whether it
> is currently installing snapshot and trigger failover immediately if it does.
> Ideally, we might also need to fail any pending read requests. However, this
> might need to be done in Ratis.
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