[
https://issues.apache.org/jira/browse/HDDS-9379?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Attila Doroszlai resolved HDDS-9379.
------------------------------------
Fix Version/s: 1.4.0
Resolution: Implemented
> Thread-local UUID generator and non-blocking random numbers source
> ------------------------------------------------------------------
>
> Key: HDDS-9379
> URL: https://issues.apache.org/jira/browse/HDDS-9379
> Project: Apache Ozone
> Issue Type: Sub-task
> Components: OM
> Affects Versions: 1.4.0
> Reporter: Vyacheslav Tutrinov
> Assignee: Vyacheslav Tutrinov
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.4.0
>
> Attachments: 2023-10-03-142452_3739x1926_scrot.png
>
>
> We've made a load test: upload 15mlns of 1k files and tried to read them from
> 150 threads (3 clients in 50 threads). A high contention was detected (47
> seconds hung in a 5-minute profile session) in
> sun.security.provider.SecureRandom.engineNextBytes(byte[]), it uses
> java.util.UUID.randomUUID() (has synchronized block at SecureRandomSpi
> implementation level).
> !2023-10-03-142452_3739x1926_scrot.png|width=1373,height=707!
> The UUID instance should be thread-local and the source of randomness should
> be non-blocking ({{{}/dev/urandom{}}},
> {{{}-Djava.security.egd=[file:/dev/./urandom|file:///dev/urandom]{}}})
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
