[jira] [Assigned] (S2GRAPH-230) ResourceManager onEvict cause segmentation fault with AnnoyModelFetcher

["DOYUNG YOON (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/S2GRAPH-230?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

DOYUNG YOON reassigned S2GRAPH-230:
-----------------------------------

    Assignee: DOYUNG YOON

> ResourceManager onEvict cause segmentation fault with AnnoyModelFetcher
> -----------------------------------------------------------------------
>
>                 Key: S2GRAPH-230
>                 URL: https://issues.apache.org/jira/browse/S2GRAPH-230
>             Project: S2Graph
>          Issue Type: Bug
>          Components: s2core
>            Reporter: DOYUNG YOON
>            Assignee: DOYUNG YOON
>            Priority: Minor
>
> Current implementation causes the segmentation fault when the query on edges that bind to custom EdgeFetcher, more specifically AnnoyModelFetcher with cacheTTLInSecs as -1.
> cacheTTLInSecs -1 means we initialize EdgeFetcher instance instead of using local cached instance. 
> SafeUpdateCache put newly instantiated EdgeFetcher instance into guava cache, then call `onEvict` method defined in ResourceManager, which immediately call close() on Annoy4s JNI library, which causes the segmentation fault.
> One quick fix on this issue is scheduling EdgeFetcher's close method in a short period of time delay in the background.



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