GitHub user birdspring opened an issue: https://github.com/apache/incubator-predictionio/issues/274
pio train error "pio build" is successfully executed on my machine. But when I tried "pio train", an error occurred to me, the log is as follows: [INFO] [Engine] Extracting datasource params... [INFO] [WorkflowUtils$] No 'name' is found. Default empty String will be used. [INFO] [Engine] Datasource params: (,DataSourceParams(myapp1,None)) [INFO] [Engine] Extracting preparator params... [INFO] [Engine] Preparator params: (,Empty) [INFO] [Engine] Extracting serving params... [INFO] [Engine] Serving params: (,Empty) [WARN] [Utils] Your hostname, yang resolves to a loopback address: 127.0.1.1; using 192.168.137.118 instead (on interface wlan0) [WARN] [Utils] Set SPARK_LOCAL_IP if you need to bind to another address [INFO] [Remoting] Starting remoting [INFO] [Remoting] Remoting started; listening on addresses :[akka.tcp://sparkDriver@192.168.137.118:59618] [WARN] [MetricsSystem] Using default name DAGScheduler for source because spark.app.id is not set. [INFO] [Engine$] EngineWorkflow.train [INFO] [Engine$] DataSource: org.template.recommendation.DataSource@41d16cc3 [INFO] [Engine$] Preparator: org.template.recommendation.Preparator@649f25f3 [INFO] [Engine$] AlgorithmList: List(org.template.recommendation.ALSAlgorithm@bf75b5c) [INFO] [Engine$] Data sanity check is on. [INFO] [Engine$] org.template.recommendation.TrainingData does not support data sanity check. Skipping check. [INFO] [Engine$] org.template.recommendation.PreparedData does not support data sanity check. Skipping check. [WARN] [BLAS] Failed to load implementation from: com.github.fommil.netlib.NativeSystemBLAS [WARN] [BLAS] Failed to load implementation from: com.github.fommil.netlib.NativeRefBLAS [WARN] [LAPACK] Failed to load implementation from: com.github.fommil.netlib.NativeSystemLAPACK [WARN] [LAPACK] Failed to load implementation from: com.github.fommil.netlib.NativeRefLAPACK [ERROR] [Executor] Exception in task 0.0 in stage 44.0 (TID 152) [ERROR] [Executor] Exception in task 3.0 in stage 44.0 (TID 155) [ERROR] [Executor] Exception in task 2.0 in stage 44.0 (TID 154) [ERROR] [Executor] Exception in task 1.0 in stage 44.0 (TID 153) [WARN] [TaskSetManager] Lost task 3.0 in stage 44.0 (TID 155, localhost): java.lang.StackOverflowError at java.lang.Exception.<init>(Exception.java:102) at java.lang.ReflectiveOperationException.<init>(ReflectiveOperationException.java:89) at java.lang.reflect.InvocationTargetException.<init>(InvocationTargetException.java:72) at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source) Any help, thanks. ---- ---- --- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. ---