Wellington Chevreuil created HBASE-24747:
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             Summary: Log an ERROR if HBaseSaslRpcServer initialisation fails 
with an uncaught exception
                 Key: HBASE-24747
                 URL: https://issues.apache.org/jira/browse/HBASE-24747
             Project: HBase
          Issue Type: Improvement
            Reporter: Wellington Chevreuil
            Assignee: Wellington Chevreuil


In ServerRpcConnection.saslReadAndProcess, if an uncaught exception happens 
while initialising HBaseSaslRpcServer, the same gets swallowed inside netty and 
never explicitly logged on RegionServer logs. With the introduction of 
pluggable sasl server providers by HBASE-23347, this situation can become more 
frequent with the addition of custom providers, if those cause 
HBaseSaslRpcServer to fail, that should be logged in 
ServerRpcConnection.saslReadAndProces.



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