[jira] [Resolved] (KAFKA-3735) RocksDB objects needs to be disposed after usage

["Guozhang Wang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-3735?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Guozhang Wang resolved KAFKA-3735.
----------------------------------
       Resolution: Fixed
    Fix Version/s: 0.10.0.1

Issue resolved by pull request 1411
[https://github.com/apache/kafka/pull/1411]

> RocksDB objects needs to be disposed after usage
> ------------------------------------------------
>
>                 Key: KAFKA-3735
>                 URL: https://issues.apache.org/jira/browse/KAFKA-3735
>             Project: Kafka
>          Issue Type: Bug
>          Components: streams
>            Reporter: Guozhang Wang
>            Assignee: Guozhang Wang
>              Labels: architecture
>             Fix For: 0.10.0.1
>
>
> The RocksDB JNI interface {{RocksObject}} has a dispose() function which need to be explicitly triggered after it is not reused, otherwise GC may not be able to de-reference it off-heap and hence effective lead to memory leak. See: https://github.com/facebook/rocksdb/issues/752#issuecomment-146511412
> We need to make sure all library-controlled RocksDB objects are disposed after usage, and also indicate users to {{close}} those out-of-control objects.
> Note that RocksDB community is also going to replace the {{dispose}} API by extending {{AutoClosable}} in the future, so this ticket may need to be re-visited when upgrade RocksDB versions:
> https://www.facebook.com/groups/rocksdb.dev/permalink/870848569680325/



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