Sonya Huang created SPARK-12563:
-----------------------------------
Summary: "No suitable driver" when calling JdbcUtils.saveTable in
isolation
Key: SPARK-12563
URL: https://issues.apache.org/jira/browse/SPARK-12563
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 1.5.2
Reporter: Sonya Huang
Priority: Minor
When calling the following function
JdbcUtils.saveTable(df, url, table, properties)
the following exception is thrown.
Exception in thread "main" java.sql.SQLException: No suitable driver
at java.sql.DriverManager.getDriver(DriverManager.java:315)
at
org.apache.spark.sql.execution.datasources.jdbc.DriverRegistry$.getDriverClassName(DriverRegistry.scala:55)
at
org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$.saveTable(JdbcUtils.scala:212)
at com.pul.sive.TestThingy$$anonfun$main$2.apply(TestThingy.scala:77)
at com.pul.sive.TestThingy$$anonfun$main$2.apply(TestThingy.scala:69)
at
scala.collection.mutable.HashMap$$anonfun$foreach$1.apply(HashMap.scala:98)
at
scala.collection.mutable.HashMap$$anonfun$foreach$1.apply(HashMap.scala:98)
at
scala.collection.mutable.HashTable$class.foreachEntry(HashTable.scala:226)
at scala.collection.mutable.HashMap.foreachEntry(HashMap.scala:39)
at scala.collection.mutable.HashMap.foreach(HashMap.scala:98)
at com.pul.sive.TestThingy$.main(TestThingy.scala:69)
at com.pul.sive.TestThingy.main(TestThingy.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at
org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:674)
at
org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:180)
at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:205)
at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:120)
at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
However, the above works if the following is called directly before:
JdbcUtils.createConnection(url, properties)
It appears that JdbcUtils.saveTable attempts to get the driver from
DriverRegistry before reading the contents of the properties argument.
Jdbc.createConnection adds the driver to DriverRegistry as a side effect, so
this lookup works.
However it also appears that DataFrame.write.jdbc(url, table, properties)
accomplishes the same thing with more flexibility, so I am not sure if
JdbcUtils.saveTable is redundant.
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