[GitHub] [druid] birTiwana commented on pull request #10920: Spark Direct Readers and Writers for Druid.

[GitBox <gi...@apache.org>]

birTiwana commented on pull request #10920:
URL: https://github.com/apache/druid/pull/10920#issuecomment-843217694


   @JulianJaffePinterest  I have tried to create a jar file from your PR branch and copied it to my spark code. I am using it to read a druid data source using the following code (I have retrieved the segments directly via the DruidMetaClient ):
   
   `val readDf = sparkSession
         .read
         .format("druid")
         .options(Map("segments" -> segmentsString))
         .load()`
   
   but I keep on hitting the error:
   
   `icationMaster.runDriver(ApplicationMaster.scala:472)
   	at org.apache.spark.deploy.yarn.ApplicationMaster.org$apache$spark$deploy$yarn$ApplicationMaster$$runImpl(ApplicationMaster.scala:308)
   	at org.apache.spark.deploy.yarn.ApplicationMaster$$anonfun$run$1.apply$mcV$sp(ApplicationMaster.scala:248)
   	at org.apache.spark.deploy.yarn.ApplicationMaster$$anonfun$run$1.apply(ApplicationMaster.scala:248)
   	at org.apache.spark.deploy.yarn.ApplicationMaster$$anonfun$run$1.apply(ApplicationMaster.scala:248)
   	at org.apache.spark.deploy.yarn.ApplicationMaster$$anon$3.run(ApplicationMaster.scala:783)
   	at java.security.AccessController.doPrivileged(Native Method)
   	at javax.security.auth.Subject.doAs(Subject.java:422)
   	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1926)
   	at org.apache.spark.deploy.yarn.ApplicationMaster.doAsUser(ApplicationMaster.scala:782)
   	at org.apache.spark.deploy.yarn.ApplicationMaster.run(ApplicationMaster.scala:247)
   	at org.apache.spark.deploy.yarn.ApplicationMaster$.main(ApplicationMaster.scala:807)
   	at org.apache.spark.deploy.yarn.ApplicationMaster.main(ApplicationMaster.scala)
   Caused by: java.lang.ClassNotFoundException: Failed to find data source: druid. Please find packages at http://spark.apache.org/third-party-projects.html
   	at org.apache.spark.sql.execution.datasources.DataSource$.lookupDataSource(DataSource.scala:675)
   	at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:213)
   	at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:186)
   	at LoadData$.main(LoadData.scala:80)
   	at LoadData.main(LoadData.scala)
   	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   	at java.lang.reflect.Method.invoke(Method.java:498)
   	at org.apache.spark.deploy.yarn.ApplicationMaster$$anon$2.run(ApplicationMaster.scala:688)
   Caused by: java.lang.ClassNotFoundException: druid.DefaultSource
   	at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
   	at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
   	at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
   	at org.apache.spark.sql.execution.datasources.DataSource$$anonfun$20$$anonfun$apply$12.apply(DataSource.scala:652)
   	at org.apache.spark.sql.execution.datasources.DataSource$$anonfun$20$$anonfun$apply$12.apply(DataSource.scala:652)
   	at scala.util.Try$.apply(Try.scala:192)
   	at org.apache.spark.sql.execution.datasources.DataSource$$anonfun$20.apply(DataSource.scala:652)
   	at org.apache.spark.sql.execution.datasources.DataSource$$anonfun$20.apply(DataSource.scala:652)
   	at scala.util.Try.orElse(Try.scala:84)
   	at org.apache.spark.sql.execution.datasources.DataSource$.lookupDataSource(DataSource.scala:652)
   	... 9 more`
   
   Not sure what I am missing here exactly but I did not see a test case for this in your PR as well. 


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