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https://issues.apache.org/jira/browse/SAMZA-1370?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jagadish closed SAMZA-1370.
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> Memory leak in CachedStore when using ByteBufferSerde as key serde
> ------------------------------------------------------------------
>
> Key: SAMZA-1370
> URL: https://issues.apache.org/jira/browse/SAMZA-1370
> Project: Samza
> Issue Type: Bug
> Reporter: Prateek Maheshwari
> Assignee: Prateek Maheshwari
> Fix For: 0.13.1
>
>
> ByteBufferSerde uses relative bulk get to serialize the provided ByteBuffer
> which changes its internal position. ByteBuffer's `equals` and `hashCode`
> depend upon its remaining elements, i.e. on its position. This means that
> when using ByteBuffers as keys in the CachedStore, flushing cache contents to
> the underlying store changes their hashCode. Since the hashCode for the key
> no longer matches the one used when inserting it into the map, the
> LinkedHashMap cannot correctly evict or remove these entries, leading to a
> memory leak.
> Changing ByteBufferSerde to use absolute get operations or duplicate the
> provided ByteBuffer before copying should fix this issue.
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