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https://issues.apache.org/jira/browse/IGNITE-2466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15138636#comment-15138636
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Semen Boikov commented on IGNITE-2466:
--------------------------------------

One possible reason for OOM is that for atomic cache we keep cache objects 
which can be needed for continuous queries until response from backup is 
received. But there is no need to keep these objects if there are no registered 
continuous queries listeners, I'm going to fix this as part of IGNITE-2587, 
let's see if issue will reporduce after this.

> OutOfMemory when ONHEAP_TIRED mode is used
> ------------------------------------------
>
>                 Key: IGNITE-2466
>                 URL: https://issues.apache.org/jira/browse/IGNITE-2466
>             Project: Ignite
>          Issue Type: Bug
>    Affects Versions: 1.5.0.final
>            Reporter: Denis Magda
>            Assignee: Nikolay Tikhonov
>             Fix For: 1.6
>
>         Attachments: MemTest.java, example-ignite.xml
>
>
> To reproduce, run two server nodes with 2g of heap each and then MemTest. 
> Servers will fail with OOME. If backups are disabled or there is only one 
> server node, it works.



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