custom datasource in spark-sql with mist - scala

Question

I have custom data source which I use in sqlContext.read.format(....sparkjobs.fileloader.DataSource). This works well via spark-submit in local & yarn mode.
But, when I invoke the same job via Mist, it throws exception:
Failed to find data source. Please find packages at http://spark-packages.org
My fat jar has the DataSource class. And also, at the beginning of the code, I logged all the jars available at classpath and I can see my jar.
Error Log:
java.lang.ClassNotFoundException: Failed to find data source: c.p.b.f.sparkjobs.fileloader.DataSource. Pleas
e find packages at http://spark-packages.org
at org.apache.spark.sql.execution.datasources.ResolvedDataSource$.lookupDataSource(ResolvedDataSource.scala:77)
at org.apache.spark.sql.execution.datasources.ResolvedDataSource$.apply(ResolvedDataSource.scala:102)
at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:119)
at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:109)
at c.p.b.f.sparkjobs.fileloader.m.McParser.processFile(McParser.scala:44)
at c.p.b.f.sparkjobs.fileloader.FileProcessor$$anonfun$processFilesSingle$1.apply(FileProcessor.scala:7
3)
at c.p.b.f.sparkjobs.fileloader.FileProcessor$$anonfun$processFilesSingle$1.apply(FileProcessor.scala:7
0)
at scala.collection.Iterator$class.foreach(Iterator.scala:727)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
at c.p.b.f.sparkjobs.fileloader.FileProcessor.processFilesSingle(FileProcessor.scala:70)
at c.p.b.f.sparkjobs.fileloader.FileProcessor$$anonfun$processFilesBulk$1.apply(FileProcessor.scala:58)
at c.p.b.f.sparkjobs.fileloader.FileProcessor$$anonfun$processFilesBulk$1.apply(FileProcessor.scala:49)
at scala.collection.Iterator$class.foreach(Iterator.scala:727)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
at scala.collection.MapLike$DefaultKeySet.foreach(MapLike.scala:174)
at c.p.b.f.sparkjobs.fileloader.FileProcessor.processFilesBulk(FileProcessor.scala:49)
at c.p.b.f.sparkjobs.fileloader.FileProcessor.init(FileProcessor.scala:33)
at c.p.b.f.sparkjobs.fileloader.Loader.execute(Loader.scala:162)
at c.p.b.f.util.LoaderApp$.execute(LoaderApp.scala:40)
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 io.hydrosphere.mist.jobs.jar.JobInstance.io$hydrosphere$mist$jobs$jar$JobInstance$$invokeMethod(JobInstance.scala:40)
at io.hydrosphere.mist.jobs.jar.JobInstance$$anonfun$run$1$$anonfun$apply$3$$anonfun$apply$4.apply(JobInstance.scala:24)
at io.hydrosphere.mist.jobs.jar.JobInstance$$anonfun$run$1$$anonfun$apply$3$$anonfun$apply$4.apply(JobInstance.scala:24)
at cats.syntax.CatchOnlyPartiallyApplied.apply(either.scala:294)
at io.hydrosphere.mist.jobs.jar.JobInstance$$anonfun$run$1$$anonfun$apply$3.apply(JobInstance.scala:24)
at io.hydrosphere.mist.jobs.jar.JobInstance$$anonfun$run$1$$anonfun$apply$3.apply(JobInstance.scala:23)
at cats.syntax.EitherOps$.flatMap$extension(either.scala:129)
at io.hydrosphere.mist.jobs.jar.JobInstance$$anonfun$run$1.apply(JobInstance.scala:23)
at io.hydrosphere.mist.jobs.jar.JobInstance$$anonfun$run$1.apply(JobInstance.scala:22)
at cats.syntax.EitherOps$.flatMap$extension(either.scala:129)
at io.hydrosphere.mist.jobs.jar.JobInstance.run(JobInstance.scala:22)
at io.hydrosphere.mist.worker.runners.scala.ScalaRunner$$anonfun$run$1.apply(ScalaRunner.scala:26)
at io.hydrosphere.mist.worker.runners.scala.ScalaRunner$$anonfun$run$1.apply(ScalaRunner.scala:25)
at cats.syntax.EitherOps$.flatMap$extension(either.scala:129)
at io.hydrosphere.mist.worker.runners.scala.ScalaRunner.run(ScalaRunner.scala:25)
at io.hydrosphere.mist.worker.runners.MistJobRunner$.run(MistJobRunner.scala:18)
at io.hydrosphere.mist.worker.WorkerActor$$anonfun$2.apply(WorkerActor.scala:78)
at io.hydrosphere.mist.worker.WorkerActor$$anonfun$2.apply(WorkerActor.scala:76)
at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: c.p.b.f.sparkjobs.fileloader.DataSource.DefaultSource
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at org.apache.spark.sql.execution.datasources.ResolvedDataSource$$anonfun$4$$anonfun$apply$1.apply(ResolvedDataSource.scala:62)
at org.apache.spark.sql.execution.datasources.ResolvedDataSource$$anonfun$4$$anonfun$apply$1.apply(ResolvedDataSource.scala:62)
at scala.util.Try$.apply(Try.scala:161)
at org.apache.spark.sql.execution.datasources.ResolvedDataSource$$anonfun$4.apply(ResolvedDataSource.scala:62)
at org.apache.spark.sql.execution.datasources.ResolvedDataSource$$anonfun$4.apply(ResolvedDataSource.scala:62)
at scala.util.Try.orElse(Try.scala:82)
at org.apache.spark.sql.execution.datasources.ResolvedDataSource$.lookupDataSource(ResolvedDataSource.scala:62)
... 47 more