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Posted to jira@kafka.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2019/02/27 07:43:00 UTC
[jira] [Commented] (KAFKA-7912) In-memory key-value store does not
support concurrent access
[ https://issues.apache.org/jira/browse/KAFKA-7912?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16779003#comment-16779003 ]
ASF GitHub Bot commented on KAFKA-7912:
---------------------------------------
ableegoldman commented on pull request #6336: KAFKA-7912: Support concurrent access in InMemoryKeyValueStore
URL: https://github.com/apache/kafka/pull/6336
Previously the InMemoryKeyValue store would throw a ConcurrentModificationException if the store was modified beneath an open iterator. The TreeMap implementation was swapped with a ConcurrentSkipListMap for similar performance while supporting concurrent access.
Added one test to AbstractKeyValueStoreTest, no existing tests caught this.
### Committer Checklist (excluded from commit message)
- [ ] Verify design and implementation
- [ ] Verify test coverage and CI build status
- [ ] Verify documentation (including upgrade notes)
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> In-memory key-value store does not support concurrent access
> -------------------------------------------------------------
>
> Key: KAFKA-7912
> URL: https://issues.apache.org/jira/browse/KAFKA-7912
> Project: Kafka
> Issue Type: Bug
> Reporter: Sophie Blee-Goldman
> Assignee: Sophie Blee-Goldman
> Priority: Major
>
> Currently, the in-memory key-value store uses a Map to store key-value pairs and fetches them by calling subMap and returning an iterator to this submap. This is unsafe as the submap is just a view of the original map and there is risk of concurrent access.
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