java.lang.ClassNotFoundException: org.postgresql.Driver

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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}

,

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

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via Google Groups by Patrick Roemer, 1 month ago
org.postgresql.Driver
via mygnet.net by Unknown author, 1 year ago
java.lang.ClassNotFoundException: org.postgresql.Driver
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1130)
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880)
at org.openxava.util.DataSourceConnectionProvider.getConnection(DataSourceConnectionProvider.java:156)
at org.openxava.mapping.ModelMapping.loadDatabaseMetadata(ModelMapping.java:271)
at org.openxava.mapping.ModelMapping.supportsSchemasInDataManipulation(ModelMapping.java:212)
at org.openxava.mapping.ModelMapping.getTableToQualifyColumn(ModelMapping.java:104)
at org.openxava.mapping.ModelMapping.getQualifiedColumn(ModelMapping.java:342)

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