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https://issues.apache.org/jira/browse/HBASE-14865?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15033106#comment-15033106
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Matteo Bertozzi commented on HBASE-14865:
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+1
> Support passing multiple QOPs to SaslClient/Server via hbase.rpc.protection
> ---------------------------------------------------------------------------
>
> Key: HBASE-14865
> URL: https://issues.apache.org/jira/browse/HBASE-14865
> Project: HBase
> Issue Type: Improvement
> Components: security
> Reporter: Appy
> Assignee: Appy
> Attachments: HBASE-14865-master-v2.patch,
> HBASE-14865-master-v3.patch, HBASE-14865-master-v4.patch,
> HBASE-14865-master-v5.patch, HBASE-14865-master-v6.patch,
> HBASE-14865-master.patch
>
>
> Currently, we can set the value of hbase.rpc.protection to one of
> authentication/integrity/privacy. It is the used to set
> {{javax.security.sasl.qop}} in SaslUtil.java.
> The problem is, if a cluster wants to switch from one qop to another, it'll
> have to take a downtime. Rolling upgrade will create a situation where some
> nodes have old value and some have new, which'll prevent any communication
> between them. There will be similar issue when clients will try to connect.
> {{javax.security.sasl.qop}} can take in a list of QOP in preferences order.
> So a transition from qop1 to qop2 can be easily done like this
> "qop1" --> "qop2,qop1" --> rolling restart --> "qop2" --> rolling restart
> Need to change hbase.rpc.protection to accept a list too.
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