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https://issues.apache.org/jira/browse/RATIS-614?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lokesh Jain updated RATIS-614:
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Attachment: RATIS-614.003.patch
> Raft leader should use state machine's last applied index for LeaderNotReady
> exception
> --------------------------------------------------------------------------------------
>
> Key: RATIS-614
> URL: https://issues.apache.org/jira/browse/RATIS-614
> Project: Ratis
> Issue Type: Bug
> Reporter: Lokesh Jain
> Assignee: Lokesh Jain
> Priority: Blocker
> Labels: ozone
> Attachments: RATIS-614.001.patch, RATIS-614.002.patch,
> RATIS-614.003.patch
>
>
> Currently Raft leader uses the StateMachineUpdater's lastAppliedIndex to
> determine if leader is ready to take requests. It should rather use
> StateMachine's lastAppliedTermIndex because it denotes the index till which
> the transactions have already been completed whereas StateMachineUpdater's
> lastAppliedIndex denotes the index till which the applyTransaction call has
> been made to the StateMachine.
> Currently the new leader might not have applied all the transactions of the
> old term. Any reads served on the new leader can be stale.
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