[jira] [Commented] (KAFKA-7454) Use lazy allocation for SslTransportLayer buffers

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-7454?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16631981#comment-16631981 ] 

ASF GitHub Bot commented on KAFKA-7454:
---------------------------------------

rajinisivaram opened a new pull request #5713: KAFKA-7454: Use lazy allocation for SslTransportLayer buffers
URL: https://github.com/apache/kafka/pull/5713
 
 
   
   ### 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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> Use lazy allocation for SslTransportLayer buffers
> -------------------------------------------------
>
>                 Key: KAFKA-7454
>                 URL: https://issues.apache.org/jira/browse/KAFKA-7454
>             Project: Kafka
>          Issue Type: Improvement
>          Components: security
>    Affects Versions: 0.11.0.3, 1.0.2, 1.1.1, 2.0.0
>            Reporter: Rajini Sivaram
>            Assignee: Rajini Sivaram
>            Priority: Major
>             Fix For: 2.1.0
>
>
> At the moment, three heap buffers are allocated for SslTransportLayers at the time when the instance is created (before establishing the connection on the client-side and when accepting the connection on the broker-side). When there are a large number of connections and the broker is overloaded, this can result in unnecessary memory pressure on the broker due to client reconnections since buffers may be allocated unnecessarily for client connections whose handshake is never processed. It will be better to lazily allocate buffers to reduce memory pressure. On the broker-side, buffers will be allocated when the first packet is received from the client, starting handshake. On the client-side, buffers will be allocated once the connection is established when the client initiates handshake.



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