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Posted to commits@cassandra.apache.org by "Dmitry Konstantinov (Jira)" <ji...@apache.org> on 2024/09/22 12:54:00 UTC
[jira] [Updated] (CASSANDRA-19942) Pooled BTree.FastBuilder keeps references to data after reset
[ https://issues.apache.org/jira/browse/CASSANDRA-19942?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dmitry Konstantinov updated CASSANDRA-19942:
--------------------------------------------
Fix Version/s: 4.0.x
4.1.x
5.0.x
5.x
> Pooled BTree.FastBuilder keeps references to data after reset
> -------------------------------------------------------------
>
> Key: CASSANDRA-19942
> URL: https://issues.apache.org/jira/browse/CASSANDRA-19942
> Project: Cassandra
> Issue Type: Bug
> Components: Local/Other
> Reporter: Dmitry Konstantinov
> Assignee: Dmitry Konstantinov
> Priority: Normal
> Fix For: 4.0.x, 4.1.x, 5.0.x, 5.x
>
> Attachments: image-2024-09-22-13-51-02-751.png
>
>
> Hi I am analyzing of argecolumn_test.TestLargeColumn test failure (CASSANDRA-19702) and have noticed that sometimes when I run the test locally it fails with OOM. The test sends an insert with a large column value.
> In the created heap dump I have found that there is a kind of memory leaking for the sent column values though thread-local variable used for re-usable Pooled BTree.FastBuilder:
> !image-2024-09-22-13-51-02-751.png!
> In normal cases it is probably not critical because the objects are not that huge but it is still a leak.
> reset() logic in BTree.FastBuilder does not clean references to such values because during other operations like build() "count" value can be reset to 0.
>
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