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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-2977) Cannot access HBase in a Kerberos secured Yarn cluster
Date Fri, 13 Nov 2015 09:43:11 GMT

    [ https://issues.apache.org/jira/browse/FLINK-2977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15003780#comment-15003780
] 

ASF GitHub Bot commented on FLINK-2977:
---------------------------------------

Github user rmetzger commented on a diff in the pull request:

    https://github.com/apache/flink/pull/1342#discussion_r44764797
  
    --- Diff: pom.xml ---
    @@ -82,6 +82,7 @@ under the License.
     		<shading-artifact-module.name>error</shading-artifact-module.name>
     		<hadoop-one.version>1.2.1</hadoop-one.version>
     		<hadoop-two.version>2.3.0</hadoop-two.version>
    +		<hbase.version>1.1.2</hbase.version>
    --- End diff --
    
    I think you can remove this version definition again.


> Cannot access HBase in a Kerberos secured Yarn cluster
> ------------------------------------------------------
>
>                 Key: FLINK-2977
>                 URL: https://issues.apache.org/jira/browse/FLINK-2977
>             Project: Flink
>          Issue Type: Bug
>          Components: YARN Client
>            Reporter: Niels Basjes
>            Assignee: Niels Basjes
>         Attachments: FLINK-2977-20151005-untested.patch, FLINK-2977-20151009.patch
>
>
> I have created a very simple Flink topology consisting of a streaming Source (the outputs
the timestamp a few times per second) and a Sink (that puts that timestamp into a single record
in HBase).
> Running this on a non-secure Yarn cluster works fine.
> To run it on a secured Yarn cluster my main routine now looks like this:
> {code}
> public static void main(String[] args) throws Exception {
>     System.setProperty("java.security.krb5.conf", "/etc/krb5.conf");
>     UserGroupInformation.loginUserFromKeytab("nbasjes@xxxxxx.NET", "/home/nbasjes/.krb/nbasjes.keytab");
>     final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
>     env.setParallelism(1);
>     DataStream<String> stream = env.addSource(new TimerTicksSource());
>     stream.addSink(new SetHBaseRowSink());
>     env.execute("Long running Flink application");
> }
> {code}
> When I run this 
>      flink run -m yarn-cluster -yn 1 -yjm 1024 -ytm 4096 ./kerberos-1.0-SNAPSHOT.jar
> I see after the startup messages:
> {quote}
> 17:13:24,466 INFO  org.apache.hadoop.security.UserGroupInformation               - Login
successful for user nbasjes@xxxxxx.NET using keytab file /home/nbasjes/.krb/nbasjes.keytab
> 11/03/2015 17:13:25	Job execution switched to status RUNNING.
> 11/03/2015 17:13:25	Custom Source -> Stream Sink(1/1) switched to SCHEDULED 
> 11/03/2015 17:13:25	Custom Source -> Stream Sink(1/1) switched to DEPLOYING 
> 11/03/2015 17:13:25	Custom Source -> Stream Sink(1/1) switched to RUNNING 
> {quote}
> Which looks good.
> However ... no data goes into HBase.
> After some digging I found this error in the task managers log:
> {quote}
> 17:13:42,677 WARN  org.apache.hadoop.hbase.ipc.RpcClient                         - Exception
encountered while connecting to the server : javax.security.sasl.SaslException: GSS initiate
failed [Caused by GSSException: No valid credentials provided (Mechanism level: Failed to
find any Kerberos tgt)]
> 17:13:42,677 FATAL org.apache.hadoop.hbase.ipc.RpcClient                         - SASL
authentication failed. The most likely cause is missing or invalid credentials. Consider 'kinit'.
> javax.security.sasl.SaslException: GSS initiate failed [Caused by GSSException: No valid
credentials provided (Mechanism level: Failed to find any Kerberos tgt)]
> 	at com.sun.security.sasl.gsskerb.GssKrb5Client.evaluateChallenge(GssKrb5Client.java:212)
> 	at org.apache.hadoop.hbase.security.HBaseSaslRpcClient.saslConnect(HBaseSaslRpcClient.java:177)
> 	at org.apache.hadoop.hbase.ipc.RpcClient$Connection.setupSaslConnection(RpcClient.java:815)
> 	at org.apache.hadoop.hbase.ipc.RpcClient$Connection.access$800(RpcClient.java:349)
> {quote}
> First starting a yarn-session and then loading my job gives the same error.
> My best guess at this point is that Flink needs the same fix as described here:
> https://issues.apache.org/jira/browse/SPARK-6918   ( https://github.com/apache/spark/pull/5586
)



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