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https://issues.apache.org/jira/browse/HADOOP-9789?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13737451#comment-13737451
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Omkar Vinit Joshi commented on HADOOP-9789:
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Hi Daryn,
I found a difference between older and newer code in terms of serverId. Is it
expected this way?
* Location :- org.apache.hadoop.security.SaslRpcServer.java
** Kerberos principal name is hdfs/localhost@LOCALHOST
** older :-
*** protocol :- hdfs
*** serverId :- *localhost*
** newer :-
*** protocol :- hdfs
*** serverId :- *localhost@LOCALHOST* (why it is instance@realm now?)
can you please give me more information and let me know if I am missing
anything.
I am using below hadoop.security.auth_to_local config in core-site.xml
hadoop.security.auth_to_local : "RULE:[1:$1@$0](.*@LOCALHOST)s/@.*//DEFAULT"
> Support server advertised kerberos principals
> ---------------------------------------------
>
> Key: HADOOP-9789
> URL: https://issues.apache.org/jira/browse/HADOOP-9789
> Project: Hadoop Common
> Issue Type: New Feature
> Components: ipc, security
> Affects Versions: 2.0.0-alpha, 3.0.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Priority: Critical
> Fix For: 3.0.0, 2.1.1-beta
>
> Attachments: HADOOP-9789.patch, HADOOP-9789.patch,
> hadoop-ojoshi-datanode-HW10351.local.log,
> hadoop-ojoshi-namenode-HW10351.local.log
>
>
> The RPC client currently constructs the kerberos principal based on the a
> config value, usually with an _HOST substitution. This means the service
> principal must match the hostname the client is using to connect. This
> causes problems:
> * Prevents using HA with IP failover when the servers have distinct
> principals from the failover hostname
> * Prevents clients from being able to access a service bound to multiple
> interfaces. Only the interface that matches the server's principal may be
> used.
> The client should be able to use the SASL advertised principal (HADOOP-9698),
> with appropriate safeguards, to acquire the correct service ticket.
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