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  1. ,

    You are not deploying the oracle driver with the application. Place the driver jars in a shared or library extension folder of your application server. (You should go with option one or two though

  2. ,
    Expert tip

    This might be an issue with the file location in the Spark submit command. Try it with

    spark-submit --master spark://master:7077 \
         hello_world_from_pyspark.py {file location}
    
    

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via Oracle Community by Ram M, 1 year ago
Failed to load MetadataIntrospector class [com.oracle.oer.sync.plugin.artifact.task.TaskIntrospector] for entity [TaskArtifactEntity] due to: com.oracle.oer.sync.plugin.artifact.task.TaskIntrospector
java.lang.ClassNotFoundException: com.oracle.oer.sync.plugin.artifact.task.TaskIntrospector	at java.net.URLClassLoader$1.run(URLClassLoader.java:366)	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(Class.java:190)	at com.oracle.oer.sync.framework.MetadataManager.getMetadataIntrospector(MetadataManager.java:349)	at com.oracle.oer.sync.framework.MetadataManager.getMetadataIntrospector(MetadataManager.java:419)	at com.oracle.oer.sync.framework.impl.MetadataIntrospectorBase.getIntrospector(MetadataIntrospectorBase.java:340)	at com.oracle.oer.sync12c.plugin.artifact.composite12c.CompositeIntrospector.getIntrospector(CompositeIntrospector.java:2584)	at com.oracle.oer.sync.framework.impl.MetadataIntrospectorBase.subIntrospect(MetadataIntrospectorBase.java:355)	at com.oracle.oer.sync.framework.impl.MetadataIntrospectorBase.relateSubArtifact(MetadataIntrospectorBase.java:447)	at com.oracle.oer.sync.framework.impl.MetadataIntrospectorBase.relateSubArtifact(MetadataIntrospectorBase.java:433)	at com.oracle.oer.sync12c.plugin.artifact.composite12c.CompositeIntrospector.generateComponentEntity(CompositeIntrospector.java:515)	at com.oracle.oer.sync12c.plugin.artifact.composite12c.CompositeIntrospector.generateCompositeEntities(CompositeIntrospector.java:423)	at com.oracle.oer.sync12c.plugin.artifact.composite12c.CompositeIntrospector.generateArtifactAsset(CompositeIntrospector.java:342)	at com.oracle.oer.sync12c.plugin.artifact.composite12c.CompositeIntrospector.introspect(CompositeIntrospector.java:276)	at com.oracle.oer.sync.plugin.reader.file.FileReader.introspectFile(FileReader.java:450)	at com.oracle.oer.sync.plugin.reader.file.FileReader.readFromFileArray(FileReader.java:318)	at com.oracle.oer.sync.plugin.reader.file.FileReader.read(FileReader.java:148)	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 com.flashline.util.classloader.ContextClassLoaderHandler.invoke(ContextClassLoaderHandler.java:39)	at com.sun.proxy.$Proxy14.read(Unknown Source)	at com.oracle.oer.sync.framework.MetadataManager.doRead(MetadataManager.java:770)	at com.oracle.oer.sync.framework.MetadataManager.start(MetadataManager.java:674)	at com.oracle.oer.sync.framework.Introspector.(Introspector.java:264)	at com.oracle.oer.sync.framework.Introspector.main(Introspector.java:537)