We need to log the exception when any of custom AuthenticatorFactory fails to be instansiated in ClientAuthenticatorProvider constructor. We are doing this to allow drill to use other available AuthenticatorFactory
Steps to repoduce:
1) Configure plain authentication
-Ddrill.customAuthFactories=org.apache.drill.exec.rpc.security.maprsasl.MapRSaslFactory to SQLLINE_JAVA_OPTS or another class that is not present in classpath.
3) Run sqlline and connect to drillbit