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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3367) WebHDFS doesn't use the logged in user when opening connections
Date Tue, 12 Feb 2013 18:47:12 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13576876#comment-13576876

Hadoop QA commented on HDFS-3367:

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:red}-1 tests included{color}.  The patch doesn't appear to include any new or modified
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:red}-1 core tests{color}.  The patch failed these unit tests in hadoop-hdfs-project/hadoop-hdfs:


    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/3964//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/3964//console

This message is automatically generated.
> WebHDFS doesn't use the logged in user when opening connections
> ---------------------------------------------------------------
>                 Key: HDFS-3367
>                 URL: https://issues.apache.org/jira/browse/HDFS-3367
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: webhdfs
>    Affects Versions: 0.23.0, 1.0.2, 2.0.0-alpha, 3.0.0
>            Reporter: Jakob Homan
>            Assignee: Daryn Sharp
>            Priority: Critical
>         Attachments: HDFS-3367.branch-23.patch, HDFS-3367.patch
> Something along the lines of
> {noformat}
> UserGroupInformation.loginUserFromKeytab(<blah blah>)
> Filesystem fs = FileSystem.get(new URI("webhdfs://blah"), conf)
> {noformat}
> doesn't work as webhdfs doesn't use the correct context and the user shows up to the
spnego filter without kerberos credentials:
> {noformat}Exception in thread "main" java.io.IOException: Authentication failed, url=http://<NN>:50070/webhdfs/v1/?op=GETDELEGATIONTOKEN&user.name=<USER>
> 	at org.apache.hadoop.hdfs.web.WebHdfsFileSystem.getHttpUrlConnection(WebHdfsFileSystem.java:337)
> 	at org.apache.hadoop.hdfs.web.WebHdfsFileSystem.httpConnect(WebHdfsFileSystem.java:347)
> 	at org.apache.hadoop.hdfs.web.WebHdfsFileSystem.run(WebHdfsFileSystem.java:403)
> 	at org.apache.hadoop.hdfs.web.WebHdfsFileSystem.getDelegationToken(WebHdfsFileSystem.java:675)
> 	at org.apache.hadoop.hdfs.web.WebHdfsFileSystem.initDelegationToken(WebHdfsFileSystem.java:176)
> 	at org.apache.hadoop.hdfs.web.WebHdfsFileSystem.initialize(WebHdfsFileSystem.java:160)
> 	at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:1386)
> ...
> Caused by: org.apache.hadoop.security.authentication.client.AuthenticationException:
GSSException: No valid credentials provided (Mechanism level: Failed to find any Kerberos
> 	at org.apache.hadoop.security.authentication.client.KerberosAuthenticator.doSpnegoSequence(KerberosAuthenticator.java:232)
> 	at org.apache.hadoop.security.authentication.client.KerberosAuthenticator.authenticate(KerberosAuthenticator.java:141)
> 	at org.apache.hadoop.security.authentication.client.AuthenticatedURL.openConnection(AuthenticatedURL.java:217)
> 	at org.apache.hadoop.hdfs.web.WebHdfsFileSystem.getHttpUrlConnection(WebHdfsFileSystem.java:332)
> 	... 16 more
> Caused by: GSSException: No valid credentials provided (Mechanism level: Failed to find
any Kerberos tgt)
> 	at sun.security.jgss.krb5.Krb5InitCredential.getInstance(Krb5InitCredential.java:130)
> ...{noformat}
> Explicitly getting the current user's context via a doAs block works, but this should
be done by webhdfs. 

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