Hi guys,
I am having troubles with a portion of code that throws an exception when executed on a cluster (through the web interface) but not when executed localy. The code : object DorotheaLassoRegression { def main(args: Array[String]): Unit = { val env = ExecutionEnvironment.getExecutionEnvironment val y = env.readTextFile( "hdfs://IP_ADDRESS/PATH_TO_FILE/dorothea_train.labels" ).setParallelism(1).map(x => x.toDouble) val Y = y.reduceGroup(iterator => iterator.toArray) env.execute() } } The exception: An error occurred while invoking the program: The main method caused an error. java.lang.ClassNotFoundException: eu.enx.flink.paper01.DorotheaLassoRegression$$anonfun$3$$anonfun$4 at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:425) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:270) at org.apache.flink.api.scala.InnerClosureFinder$$anon$4.visitMethodInsn(ClosureCleaner.scala:317) at com.esotericsoftware.reflectasm.shaded.org.objectweb.asm.ClassReader.accept(Unknown Source) at com.esotericsoftware.reflectasm.shaded.org.objectweb.asm.ClassReader.accept(Unknown Source) at org.apache.flink.api.scala.ClosureCleaner$.getInnerClasses(ClosureCleaner.scala:93) at org.apache.flink.api.scala.ClosureCleaner$.clean(ClosureCleaner.scala:113) at org.apache.flink.api.scala.DataSet.clean(DataSet.scala:123) at org.apache.flink.api.scala.DataSet$$anon$9.(DataSet.scala:635) at org.apache.flink.api.scala.DataSet.reduceGroup(DataSet.scala:634) at eu.enx.flink.paper01.DorotheaLassoRegression$.main(DorotheaLassoRegression.scala:42) at eu.enx.flink.paper01.DorotheaLassoRegression.main(DorotheaLassoRegression.scala) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:437) at org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:353) at org.apache.flink.client.program.Client.getOptimizedPlan(Client.java:229) at org.apache.flink.client.web.JobSubmissionServlet.doGet(JobSubmissionServlet.java:183) at javax.servlet.http.HttpServlet.service(HttpServlet.java:668) at javax.servlet.http.HttpServlet.service(HttpServlet.java:770) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:532) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:453) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:965) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:388) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:187) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:901) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117) at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:47) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:113) at org.eclipse.jetty.server.Server.handle(Server.java:352) at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:596) at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:1048) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:549) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:211) at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:425) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:489) at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:436) at java.lang.Thread.run(Thread.java:745) Line 42 is the reduceGroup operation. Do you have any ideas ? Is it a version problem ? Thank you for your help, kind regards. Thomas ------------------------- Thomas Peel Data Scientist (M) +32 478 98 93 81 EURA NOVA Rue Emile Francqui, 4 1435 Mont-Saint-Guibert (T) +32 10 75 02 00 euranova.eu