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From Imran Rajjad <raj...@gmail.com>
Subject Re: Oracle Table not resolved [Spark 2.1.1]
Date Tue, 29 Aug 2017 05:41:15 GMT
the jdbc url is invalid, but strangely it should have thrown ORA- exception

On Mon, Aug 28, 2017 at 4:55 PM, Naga G <gudurunaga@gmail.com> wrote:

> Not able to find the database name.
> ora is the database in the below url ?
>
> Sent from Naga iPad
>
> > On Aug 28, 2017, at 4:06 AM, Imran Rajjad <rajjad@gmail.com> wrote:
> >
> > Hello,
> >
> > I am trying to retrieve an oracle table into Dataset<Row> using
> following code
> >
> > String url = "jdbc:oracle@localhost:1521:ora";
> >   Dataset<Row> jdbcDF = spark.read()
> >       .format("jdbc")
> >       .option("driver", "oracle.jdbc.driver.OracleDriver")
> >       .option("url", url)
> >       .option("dbtable", "INCIDENTS")
> >       .option("user", "user1")
> >       .option("password", "pass1")
> >       .load();
> >
> >   System.out.println(jdbcDF.count());
> >
> > below is the stack trace
> >
> > java.lang.NullPointerException
> >  at org.apache.spark.sql.execution.datasources.jdbc.
> JDBCRDD$.resolveTable(JDBCRDD.scala:72)
> >  at org.apache.spark.sql.execution.datasources.jdbc.JDBCRelation.<init>(
> JDBCRelation.scala:113)
> >  at org.apache.spark.sql.execution.datasources.jdbc.
> JdbcRelationProvider.createRelation(JdbcRelationProvider.scala:45)
> >  at org.apache.spark.sql.execution.datasources.
> DataSource.resolveRelation(DataSource.scala:330)
> >  at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:152)
> >  at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:125)
> >  at com.elogic.hazelcast_test.JDBCTest.test(JDBCTest.java:56)
> >  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 org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(
> FrameworkMethod.java:50)
> >  at org.junit.internal.runners.model.ReflectiveCallable.run(
> ReflectiveCallable.java:12)
> >  at org.junit.runners.model.FrameworkMethod.invokeExplosively(
> FrameworkMethod.java:47)
> >  at org.junit.internal.runners.statements.InvokeMethod.
> evaluate(InvokeMethod.java:17)
> >  at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
> >  at org.junit.runners.BlockJUnit4ClassRunner.runChild(
> BlockJUnit4ClassRunner.java:78)
> >  at org.junit.runners.BlockJUnit4ClassRunner.runChild(
> BlockJUnit4ClassRunner.java:57)
> >  at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
> >  at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
> >  at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
> >  at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
> >  at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
> >  at org.junit.internal.runners.statements.RunBefores.
> evaluate(RunBefores.java:26)
> >  at org.junit.internal.runners.statements.RunAfters.evaluate(
> RunAfters.java:27)
> >  at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> >  at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(
> JUnit4TestReference.java:86)
> >  at org.eclipse.jdt.internal.junit.runner.TestExecution.
> run(TestExecution.java:38)
> >  at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.
> runTests(RemoteTestRunner.java:459)
> >  at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.
> runTests(RemoteTestRunner.java:678)
> >  at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.
> run(RemoteTestRunner.java:382)
> >  at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.
> main(RemoteTestRunner.java:192)
> >
> > Apparently the connection is made but Table is not being detected. Any
> ideas whats wrong with the code?
> >
> > regards,
> > Imran
> > --
> > I.R
>



-- 
I.R

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