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From "Wei-Chiu Chuang (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HADOOP-14708) FsckServlet can not create SaslRpcClient with auth KERBEROS_SSL
Date Fri, 04 Aug 2017 19:07:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-14708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16114841#comment-16114841
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Wei-Chiu Chuang edited comment on HADOOP-14708 at 8/4/17 7:06 PM:
------------------------------------------------------------------

[~cltlfcjin] thanks for reporting the issue.
However, I don't have the problem you described. The fsck command line tool as a client does
not have problem authenticating with NN on my cluster.

Furthermore, the log you posted suggests the problem is the authentication between the NameNode
FsckServlet (which starts a dfsclient to connect to NN) and NameNode.

If there's a bug, it is strictly a HDFS RPC authentication bug, nothing to do with JspHelper.
Because it's a HDFS RPC, it should have not used KERBEROS_SSL at all.

Can you check if you have the correct client authentication configuration in the NameNode
configuration?


was (Author: jojochuang):
[~cltlfcjin] thanks for reporting the issue.
However, I don't have the problem you described. The fsck command line tool as a client does
not have problem authenticating with NN on my cluster.

Furthermore, the log you posted suggests the problem is the authentication between the NameNode
FsckServlet (which starts a dfsclient to connect to NN) and NameNode.

If there's a bug, it is strictly a HDFS RPC authentication bug, nothing to do with JspHelper.
Because it's a HDFS RPC, it should have not used KERBEROS_SSL at all.

> FsckServlet can not create SaslRpcClient with auth KERBEROS_SSL
> ---------------------------------------------------------------
>
>                 Key: HADOOP-14708
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14708
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 2.7.3, 2.8.1, 3.0.0-alpha3
>            Reporter: Lantao Jin
>         Attachments: FSCK.log, HADOOP-14708.001.patch
>
>
> FSCK started by xx (auth:KERBEROS_SSL) failed with exception msg "fsck encountered internal
errors!"
> FSCK use FSCKServlet to submit RPC to NameNode, it use {{KERBEROS_SSL}} as its {{AuthenticationMethod}}
in {{JspHelper.java}}
> {code}
>   /** Same as getUGI(context, request, conf, KERBEROS_SSL, true). */
>   public static UserGroupInformation getUGI(ServletContext context,
>       HttpServletRequest request, Configuration conf) throws IOException {
>     return getUGI(context, request, conf, AuthenticationMethod.KERBEROS_SSL, true);
>   }
> {code}
> But when setup SaslConnection with server, KERBEROS_SSL will failed to create SaslClient
instance. See {{SaslRpcClient.java}}
> {code}
> private SaslClient createSaslClient(SaslAuth authType)
>       throws SaslException, IOException {
>       ....
>       case KERBEROS: {
>         if (ugi.getRealAuthenticationMethod().getAuthMethod() !=
>             AuthMethod.KERBEROS) {
>           return null; // client isn't using kerberos
>         }
> {code}



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