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From Maciej Bryński (JIRA) <j...@apache.org>
Subject [jira] [Created] (SPARK-18022) java.lang.NullPointerException instead of real exception when saving DF to MySQL
Date Thu, 20 Oct 2016 06:06:58 GMT
Maciej Bryński created SPARK-18022:
--------------------------------------

             Summary: java.lang.NullPointerException instead of real exception when saving
DF to MySQL
                 Key: SPARK-18022
                 URL: https://issues.apache.org/jira/browse/SPARK-18022
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 2.0.1
            Reporter: Maciej Bryński
            Priority: Minor


Hi,
I have found following issue.
When there is an exception while saving dataframe to MySQL I'm unable to get it.
Instead of I'm getting following stacktrace.
{code}
16/10/20 06:00:35 WARN TaskSetManager: Lost task 56.0 in stage 10.0 (TID 3753, dwh-hn28.adpilot.co):
java.lang.NullPointerException: Cannot suppress a null exception.
        at java.lang.Throwable.addSuppressed(Throwable.java:1046)
        at org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$.savePartition(JdbcUtils.scala:256)
        at org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$$anonfun$saveTable$1.apply(JdbcUtils.scala:314)
        at org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$$anonfun$saveTable$1.apply(JdbcUtils.scala:313)
        at org.apache.spark.rdd.RDD$$anonfun$foreachPartition$1$$anonfun$apply$28.apply(RDD.scala:902)
        at org.apache.spark.rdd.RDD$$anonfun$foreachPartition$1$$anonfun$apply$28.apply(RDD.scala:902)
        at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1916)
        at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1916)
        at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:70)
        at org.apache.spark.scheduler.Task.run(Task.scala:86)
        at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:274)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
{code}

The real exception could be for example duplicate on primary key etc.




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