Spark 1.6.1; Java 7; Hadoop 2.6
On Thursday, June 16, 2016, Ted Yu <yuzhih...@gmail.com> wrote:
> 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
> <javascript:_e(%7B%7D,'cvml','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
>>
>>
>>
>> --
>> View this message in context:
>> http://apache-spark-user-list.1001560.n3.nabble.com/Kerberos-setup-in-Apache-spark-connecting-to-remote-HDFS-Yarn-tp27181.html
>> Sent from the Apache Spark User List mailing list archive at Nabble.com.
>>
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>
