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https://issues.apache.org/jira/browse/FLINK-9437?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Till Rohrmann reassigned FLINK-9437:
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Assignee: Till Rohrmann
> 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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