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https://issues.apache.org/jira/browse/FLUME-3315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17608586#comment-17608586
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ASF subversion and git services commented on FLUME-3315:
--------------------------------------------------------

Commit dbc49b7b2ee663858317891d2dbf49fd00b55c3c in flume's branch 
refs/heads/trunk from Ralph Goers
[ https://gitbox.apache.org/repos/asf?p=flume.git;h=dbc49b7b ]

FLUME-3315 - Add missing test keystores


> [KafkaSink][KafkaSource] Impossible to disable hostname verification with SSL 
> enryption
> ---------------------------------------------------------------------------------------
>
>                 Key: FLUME-3315
>                 URL: https://issues.apache.org/jira/browse/FLUME-3315
>             Project: Flume
>          Issue Type: Bug
>          Components: Configuration, Sinks+Sources
>    Affects Versions: 1.9.0
>         Environment: Flume 1.9.0
> Kafka 2.1.0
>            Reporter: Jérémy LE BERRE
>            Priority: Major
>          Time Spent: 4h 10m
>  Remaining Estimate: 0h
>
> The documentation says :
> {quote}Note: By default the property 
> {{ssl.endpoint.identification.algorithm}} is not defined, so hostname 
> verification is not performed. In order to enable hostname verification, set 
> the following properties
> {code:java}
> a1.sources.source1.kafka.consumer.ssl.endpoint.identification.algorithm=HTTPS{code}
> {quote}
> But with Flume *1.9.0* this is not true anymore because since Kafka 2.0.0 
> hostname verification is enable by default.
> {quote}*+Notable changes in 2.0.0+*
>  ...
>  The default value for {{ssl.endpoint.identification.algorithm}} was changed 
> to {{https}}, which performs hostname verification (man-in-the-middle attacks 
> are possible otherwise). Set {{ssl.endpoint.identification.algorithm}} to an 
> empty string to restore the previous behaviour.
> {quote}
> The problem is that it is impossible to disable hostname verification since 
> flume does not support empty values in configuration (cf 
> {{FlumeConfiguration.addRawProperty}})



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