DOYUNG YOON created S2GRAPH-230:
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Summary: 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
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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