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From "Alexey Stelmak (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-8888) Possible data loss durring restaring of the nodes with empty pds
Date Mon, 06 Aug 2018 11:19:00 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-8888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16570062#comment-16570062
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Alexey Stelmak commented on IGNITE-8888:
----------------------------------------

TC: https://ci.ignite.apache.org/viewType.html?buildTypeId=IgniteTests24Java8_RunAll&branch_IgniteTests24Java8=pull%2F4485%2Fhead&tab=buildTypeStatusDiv

> Possible data loss durring restaring of the nodes with empty pds
> ----------------------------------------------------------------
>
>                 Key: IGNITE-8888
>                 URL: https://issues.apache.org/jira/browse/IGNITE-8888
>             Project: Ignite
>          Issue Type: Bug
>          Components: persistence
>    Affects Versions: 2.4
>            Reporter: Andrey Aleksandrov
>            Assignee: Alexey Stelmak
>            Priority: Major
>             Fix For: 2.7
>
>         Attachments: reproducer.java
>
>
> Case: 
> 1)Start 3 data nodes and activate the cluster with cache with 1 backup and PartitionLossPolicy.READ_ONLY_SAFE.
> 2)Start client and add the data to your cache. Stop the client
> 3)Stop DN2 and clear it pds and val
> 4)Start DN2. Rebalance will start.
> 5)During rebalance stop DN3.
> 6)Start DN3.
> At this moment some partitions from DN2 marked as LOST and cache size will be less than
expected.
> 7) Run resetLostPartitions(caches).
> Now all partitions on DN2 marked as OWNING but cache size is still less than expected.
> Workaround:
> after step 6 do:
> 7)force rebalance using deactivate/activate methods.
> 8)wait for completion of rebalance
> Now cache size is expected but some partitions from DN2 marked as LOST
> 9)Run resetLostPartitions(caches).
> Now cache size is OK and all partitions from DN2 marked as OWNING.
> However, looks like without force rebalance we have data loss here.
>  



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