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https://issues.apache.org/jira/browse/IGNITE-21348?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Denis Chudov updated IGNITE-21348:
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Summary: Trigger the lease negotiation retry in case when the lease
candidate is no more in assignments (was: Trigger lease negotiation retry in
case when the lease candidate is no more in assignments)
> Trigger the lease negotiation retry in case when the lease candidate is no
> more in assignments
> ----------------------------------------------------------------------------------------------
>
> Key: IGNITE-21348
> URL: https://issues.apache.org/jira/browse/IGNITE-21348
> Project: Ignite
> Issue Type: Bug
> Reporter: Denis Chudov
> Priority: Major
> Labels: ignite-3
>
> On receiving the "lease granted" message, the candidate replica tries to
> catch up the actual storage state, in order to do that it makes read index
> request. But in case when this candidate is no more a member of assignments
> (and replication group) this request fails and is retried until the lease
> negotiation interval exceeds. This makes no sense because such retries will
> not be successful, and the current candidate is not a good candidate anymore
> - because, although the leaseholder may be not a part of replication group,
> preferably it should be, and should be its leader.
> The assignment changes when some of current candidates and leaseholders are
> no more included in new assignment set, should be detected on the placement
> driver active actor, and the current lease should be revoked (if negotiation
> is in progress) or not prolonged. The new negotitation will be triggered
> automatically by the lease updater.
> *Implementation notes*
> This assignment changes detection should be done on placement driver side,
> because the events of assignment changes can be processed on different nodes
> in different time, and there is already assignments tracker as a part of
> placement driver.
>
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