bq. Caused by: KrbException: Cannot locate default realm
Can you show the rest of the stack trace ?
What versions of Spark / Hadoop are you using ?
Which version of Java are you using (local and in cluster) ?
Thanks
On Thu, Jun 16, 2016 at 6:32 AM, akhandeshi <ami.khande...@gmail.com> wrote:
> I am trying to setup my IDE to a scala spark application. I want to access
> HDFS files from remote Hadoop server that has Kerberos enabled. My
> understanding is I should be able to do that from Spark. Here is my code
> so
> far:
>
> val sparkConf = new SparkConf().setAppName(appName).setMaster(master);
>
> if(jars.length>0) {
> sparkConf.setJars(jars);
> }
>
> if(!properties.isEmpty) {
> //val iter = properties.keys.iterator
> for((k,v)<-properties)
> sparkConf.set(k, v);
> } else {
> sparkConf
> .set("spark.executor.memory", "1024m")
> .set("spark.cores.max", "1")
> .set("spark.default.parallelism", "4");
> }
>
> try {
> if(!StringUtils.isBlank(principal) &&
> !StringUtils.isBlank(keytab)) {
> //UserGroupInformation.setConfiguration(config);
>
> UserGroupInformation.loginUserFromKeytab(principal, keytab);
> }
> } catch {
> case ioe:IOException =>{
> println("Failed to login to Hadoop [principal = "
> + principal + ", keytab
> = " + keytab + "]");
> ioe.printStackTrace();}
> }
> val sc = new SparkContext(sparkConf)
> val MY_FILE: String =
> "hdfs://remoteserver:port/file.out"
> val rDD = sc.textFile(MY_FILE,10)
> println("Lines "+rDD.count);
>
> I have core-site.xml in my classpath. I changed hadoop.ssl.enabled to
> false
> as it was expecting a secret key. The principal I am using is correct. I
> tried username/_HOST@fully.qualified.domain and
> username@fully.qualified.domain with no success. I tried running spark in
> local mode and yarn client mode. I am hoping someone has a recipe/solved
> this problem. Any pointers to help setup/debug this problem will be
> helpful.
>
> I am getting following error message:
>
> Caused by: java.lang.IllegalArgumentException: Can't get Kerberos realm
> at
>
> org.apache.hadoop.security.HadoopKerberosName.setConfiguration(HadoopKerberosName.java:65)
> at
>
> org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:227)
> at
>
> org.apache.hadoop.security.UserGroupInformation.setConfiguration(UserGroupInformation.java:249)
> at
> org.apache.spark.examples.SparkYarn$.launchClient(SparkYarn.scala:55)
> at org.apache.spark.examples.SparkYarn$.main(SparkYarn.scala:83)
> at org.apache.spark.examples.SparkYarn.main(SparkYarn.scala)
> ... 6 more
> Caused by: java.lang.reflect.InvocationTargetException
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
>
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:497)
> at
>
> org.apache.hadoop.security.authentication.util.KerberosUtil.getDefaultRealm(KerberosUtil.java:75)
> at
>
> org.apache.hadoop.security.HadoopKerberosName.setConfiguration(HadoopKerberosName.java:63)
> ... 11 more
> Caused by: KrbException: Cannot locate default realm
>
>
>
> --
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