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https://issues.apache.org/jira/browse/IGNITE-1605?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vladimir Ershov reassigned IGNITE-1605:
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Assignee: Vladimir Ershov (was: Alexey Goncharuk)
> Provide stronger data loss check
> --------------------------------
>
> Key: IGNITE-1605
> URL: https://issues.apache.org/jira/browse/IGNITE-1605
> Project: Ignite
> Issue Type: Task
> Reporter: Yakov Zhdanov
> Assignee: Vladimir Ershov
>
> Need to provide stronger data loss check.
> Currently node can fire event - EVT_CACHE_REBALANCE_PART_DATA_LOST
> However, this is not enough since if there is strong requirement on
> application behavior on data loss e.g. further cache updates should throw
> exception - this requirement cannot currently be met even with use of cache
> interceptor.
> Suggestions:
> * Introduce CacheDataLossPolicy enum: FAIL_OPS, NOOP and put it to
> configuration
> * If node fires PART_LOST_EVT then any update to lost partition will throw
> (or will not throw) exception according to DataLossPolicy
> * ForceKeysRequest should be completed with exception (if plc == FAIL) if all
> nodes to request from are gone. So, all gets/puts/txs should fail.
> * Add a public API method in order to allow a recovery from a failed state.
> Another solution is to detect partition loss at the time partition exchange
> completes. Since we hold topology lock during the exchange, we can easily
> check that there are no owners for a partition and act as a topology
> validator in case FAIL policy is configured. There is one thing needed to be
> carefully analyzed: demand worker should not park partition as owning in case
> last owner leaves grid before the corresponding exchange completes.
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