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https://issues.apache.org/jira/browse/SPARK-23790?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16412974#comment-16412974
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Stavros Kontopoulos commented on SPARK-23790:
---------------------------------------------
[~q79969786] I see the PRs you created to fix the other PR, btw the
doAsRealUser does the work:
{quote}18/03/23 19:26:18 DEBUG UserGroupInformation: PrivilegedAction
as:hive@LOCAL (auth:KERBEROS)
from:org.apache.hadoop.hive.thrift.client.TUGIAssumingTransport.open(TUGIAssumingTransport.java:49)
18/03/23 19:26:18 DEBUG TSaslTransport: opening transport
org.apache.thrift.transport.TSaslClientTransport@64201482
18/03/23 19:26:18 DEBUG TSaslClientTransport: Sending mechanism name GSSAPI and
initial response of length 607
18/03/23 19:26:18 DEBUG TSaslTransport: CLIENT: Writing message with status
START and payload length 6
18/03/23 19:26:18 DEBUG TSaslTransport: CLIENT: Writing message with status OK
and payload length 607
18/03/23 19:26:18 DEBUG TSaslTransport: CLIENT: Start message handled
18/03/23 19:26:18 DEBUG TSaslTransport: CLIENT: Received message with status OK
and payload length 108
18/03/23 19:26:18 DEBUG TSaslTransport: CLIENT: Writing message with status OK
and payload length 0
18/03/23 19:26:18 DEBUG TSaslTransport: CLIENT: Received message with status OK
and payload length 32
18/03/23 19:26:18 DEBUG TSaslTransport: CLIENT: Writing message with status
COMPLETE and payload length 32
18/03/23 19:26:18 DEBUG TSaslTransport: CLIENT: Main negotiation loop complete
18/03/23 19:26:18 DEBUG TSaslTransport: CLIENT: SASL Client receiving last
message
18/03/23 19:26:18 DEBUG TSaslTransport: CLIENT: Received message with status
COMPLETE and payload length 0
18/03/23 19:26:18 INFO metastore: Connected to metastore.
{quote}
The reason is that I use an earlier branch to build stuff for the customer
which does not contain the commit. Thank you though there is a regression I
should know for the next releases and will follow the work being done. My
problem is that I tried to fetch delegation tokens earlier so consequent
operations dont use a TGT all the time but hit this issue with HadoopRDD. I
believed I could add the delegation tokens when the mesos scheduler backend
starts like in the case of yarn where Client.java does something similar.
> proxy-user failed connecting to a kerberos configured metastore
> ---------------------------------------------------------------
>
> Key: SPARK-23790
> URL: https://issues.apache.org/jira/browse/SPARK-23790
> Project: Spark
> Issue Type: Bug
> Components: Mesos
> Affects Versions: 2.3.0
> Reporter: Stavros Kontopoulos
> Priority: Major
>
> This appeared at a customer trying to integrate with a kerberized hdfs
> cluster.
> This can be easily fixed with the proposed fix
> [here|https://github.com/apache/spark/pull/17333] and the problem was
> reported first [here|https://issues.apache.org/jira/browse/SPARK-19995] for
> yarn.
> The other option is to add the delegation tokens to the current user's UGI as
> in [here|https://github.com/apache/spark/pull/17335] . The last fixes the
> problem but leads to a failure when someones uses a HadoopRDD because the
> latter, uses FileInputFormat to get the splits which calls the local ticket
> cache by using TokenCache.obtainTokensForNamenodes. Eventually this will fail
> with:
> {quote}Exception in thread "main"
> org.apache.hadoop.ipc.RemoteException(java.io.IOException): Delegation Token
> can be issued only with kerberos or web authenticationat
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getDelegationToken(FSNamesystem.java:5896)
> {quote}
> This implies that security mode is SIMPLE and hadoop libs there are not aware
> of kerberos.
> This is related to this issue the workaround decided was to
> [trick|https://github.com/apache/spark/blob/a33655348c4066d9c1d8ad2055aadfbc892ba7fd/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala#L795-L804]
> hadoop.
>
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