Xiao Chen commented on HADOOP-14083:

Thanks John for filing a jira and providing a patch, and Allen for discussion.

I agree with Allen that best practice is default to strong, and allow people to 

But from this 
 of HADOOP-13812, clients could break outright after upgrading. HADOOP-13812 is 
marked incompatible, but in x.y.z branches to include tomcat security fixes. 

So choosing between the two frown-upon's, IMO we should trade off for 
compatibility here, and release doc it so security-concerned users are aware.

> KMS should support old SSL clients
> ----------------------------------
>                 Key: HADOOP-14083
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14083
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: kms
>    Affects Versions: 2.8.0, 2.7.4, 2.6.6
>            Reporter: John Zhuge
>            Assignee: John Zhuge
>            Priority: Minor
>         Attachments: HADOOP-14083.branch-2.001.patch
> HADOOP-13812 upgraded Tomcat to 6.0.48 which filters weak ciphers. Old SSL 
> clients such as curl stop working. The symptom is {{NSS error -12286}} when 
> running {{curl -v}}.
> Instead of forcing the SSL clients to upgrade, we can configure Tomcat to 
> explicitly allow enough weak ciphers so that old SSL clients can work.

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