[jira] [Closed] (FLINK-9437) Revert cypher suite update

["Till Rohrmann (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-9437?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Till Rohrmann closed FLINK-9437.
--------------------------------
    Resolution: Fixed

Fixed via
1.5.1: 6cd84a8db454a514e36ba4623f661c6db8696bcc

> Revert cypher suite update
> --------------------------
>
>                 Key: FLINK-9437
>                 URL: https://issues.apache.org/jira/browse/FLINK-9437
>             Project: Flink
>          Issue Type: Bug
>          Components: Security
>    Affects Versions: 1.5.0
>            Reporter: Till Rohrmann
>            Assignee: Till Rohrmann
>            Priority: Blocker
>             Fix For: 1.5.1
>
>
> The changes of FLINK-9310 causes Flink to fail when sending data between {{TaskManagers}} as reported by a user [1]. The problem seems to be that Netty's {{SslHandler}} (v4.0.27) tries to allocate heap buffers when using a GCM enabled cypher suite. However, since we explicitly prohibit the allocation of heap buffers it fails. In later Netty versions, this behaviour seems to be fixed.
> I propose to revert the changes of FLINK-9310 and set the default cypher algorithm to {{TLS_RSA_WITH_AES_128_CBC_SHA}}.
> [1] http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/Flink-1-5-Job-fails-to-execute-in-multiple-taskmanagers-parallelism-gt-1-td22467.html



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