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From "Maxim Muzafarov (Jira)" <j...@apache.org>
Subject [jira] [Updated] (IGNITE-10058) resetLostPartitions() leaves an additional copy of a partition in the cluster
Date Thu, 10 Oct 2019 11:27:00 GMT

     [ https://issues.apache.org/jira/browse/IGNITE-10058?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Maxim Muzafarov updated IGNITE-10058:
-------------------------------------
    Fix Version/s:     (was: 2.8)

> resetLostPartitions() leaves an additional copy of a partition in the cluster
> -----------------------------------------------------------------------------
>
>                 Key: IGNITE-10058
>                 URL: https://issues.apache.org/jira/browse/IGNITE-10058
>             Project: Ignite
>          Issue Type: Bug
>            Reporter: Stanislav Lukyanov
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> If there are several copies of a LOST partition, resetLostPartitions() will leave all
of them in the cluster as OWNING.
> Scenario:
> 1) Start 4 nodes, a cache with backups=0 and READ_WRITE_SAFE, fill the cache
> 2) Stop one node - some partitions are recreated on the remaining nodes as LOST
> 3) Start one node - the LOST partitions are being rebalanced to the new node from the
existing ones
> 4) Wait for rebalance to complete
> 5) Call resetLostPartitions()
> After that the partitions that were LOST become OWNING on all nodes that had them. Eviction
of these partitions doesn't start.
> Need to correctly evict additional copies of LOST partitions either after rebalance on
step 4 or after resetLostPartitions() call on step 5.
> Current resetLostPartitions() implementation does call checkEvictions(), but the ready
affinity assignment contains several nodes per partition for some reason.



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