Appy created HBASE-14865:
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Summary: 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
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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