liudezhi2098 opened a new pull request #14784:
URL: https://github.com/apache/pulsar/pull/14784
### Motivation
authState.getAuthRole() will throws exception.
```
DEBUG org.apache.pulsar.broker.authentication.PulsarSaslServer -
serviceHostname is 'chinaunion-2.internal.cloudapp.net', servicePrincipalName
is 'broker', SASL mechanism(mech) is 'GSSAPI'.
[pulsar-io-4-2] ERROR org.apache.pulsar.broker.service.ServerCnx -
[/*.*.*.*:48378] Error trying to authenticate: operation=connect, principal=null
java.lang.IllegalStateException: Authentication incomplete
at
com.sun.security.sasl.gsskerb.GssKrb5Server.getAuthorizationID(GssKrb5Server.java:343)
~[?:1.8.0_322]
at
org.apache.pulsar.broker.authentication.PulsarSaslServer.getAuthorizationID(PulsarSaslServer.java:139)
~[org.apache.pulsar-pulsar-broker-auth-sasl-2.9.1.jar:2.9.2-SNAPSHOT]
at
org.apache.pulsar.broker.authentication.SaslAuthenticationDataSource.getAuthorizationID(SaslAuthenticationDataSource.java:54)
~[org.apache.pulsar-pulsar-broker-auth-sasl-2.9.1.jar:2.9.2-SNAPSHOT]
at
org.apache.pulsar.broker.authentication.SaslAuthenticationState.getAuthRole(SaslAuthenticationState.java:51)
~[org.apache.pulsar-pulsar-broker-auth-sasl-2.9.1.jar:2.9.2-SNAPSHOT]
at
org.apache.pulsar.broker.authentication.AuthenticationProviderList$AuthenticationListState.getAuthRole(AuthenticationProviderList.java:88)
~[pulsar-broker-common.jar:2.9.2-SNAPSHOT]
at
org.apache.pulsar.broker.service.ServerCnx.handleConnect(ServerCnx.java:814)
[pulsar-broker.jar:2.9.2-SNAPSHOT]
at
org.apache.pulsar.common.protocol.PulsarDecoder.channelRead(PulsarDecoder.java:167)
[pulsar-common.jar:2.9.2-SNAPSHOT]
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
[io.netty-netty-transport-4.1.72.Final.jar:4.1.72.Final]
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
[io.netty-netty-transport-4.1.72.Final.jar:4.1.72.Final]
```
### Documentation
- [x] `no-need-doc`
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