[jira] [Assigned] (IGNITE-14003) OOM on creating rebalance iterator while rebalancing cache with large values.

["Ivan Daschinskiy (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-14003?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ivan Daschinskiy reassigned IGNITE-14003:
-----------------------------------------

    Assignee: Ivan Daschinskiy

> OOM on creating rebalance iterator while rebalancing cache with large values.
> -----------------------------------------------------------------------------
>
>                 Key: IGNITE-14003
>                 URL: https://issues.apache.org/jira/browse/IGNITE-14003
>             Project: Ignite
>          Issue Type: Bug
>    Affects Versions: 2.9, 2.8.1, 2.9.1
>            Reporter: Ivan Daschinskiy
>            Assignee: Ivan Daschinskiy
>            Priority: Critical
>         Attachments: ReplicatedCacheRebalanceTest.java
>
>
> Scenario
> 1. Start replicated cache on ignite node, memory region approx 6 Gb, heap 1Gb
> 2. Load significant amount of data to cache with values approx 200Kb (~20K kv pairs)
> 3. Start another node 
> First node (supplier) will crash while initializing rebalance iterator with OOM
> Main reason -- all values, to whon pointed from leaf of BTree, are all loaded to buffer in BPlusTree#ForwardCursor. For replicated cache, 512 iterators for each partition are created at once.
> Reproducer is attached, run it with *-Xmx1G*



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