[
https://issues.apache.org/jira/browse/SPARK-20459?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Xiao Li reassigned SPARK-20459:
-------------------------------
Assignee: Sean Owen
> JdbcUtils throws IllegalStateException: Cause already initialized after
> getting SQLException
> --------------------------------------------------------------------------------------------
>
> Key: SPARK-20459
> URL: https://issues.apache.org/jira/browse/SPARK-20459
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.0.1, 2.0.2, 2.1.0
> Reporter: Jessie Yu
> Assignee: Sean Owen
> Priority: Minor
> Fix For: 2.2.1, 2.3.0
>
>
> Testing some failure scenarios, and JdbcUtils throws an IllegalStateException
> instead of the expected SQLException:
> {code}
> scala>
> org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils.saveTable(prodtbl,url3,"DB2.D_ITEM_INFO",prop1)
>
> 17/04/03 17:19:35 ERROR Executor: Exception in task 0.0 in stage 1.0 (TID 1)
>
> java.lang.IllegalStateException: Cause already initialized
>
> .at java.lang.Throwable.setCause(Throwable.java:365)
>
> .at java.lang.Throwable.initCause(Throwable.java:341)
>
> .at
> org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$.savePartition(JdbcUtils.scala:241)
> .at
> org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$$anonfun$saveTable$1.apply(JdbcUtils.scala:300)
> .at
> org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$$anonfun$saveTable$1.apply(JdbcUtils.scala:299)
> .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$$anonfun$runJob$5.apply(SparkContext.scala:1899)
>
> .at
> org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1899)
>
> .at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:70)
>
> .at org.apache.spark.scheduler.Task.run(Task.scala:86)
>
> .at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:274)
> .at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1153
> .at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628
> .at java.lang.Thread.run(Thread.java:785)
>
> {code}
> The code in JdbcUtils.savePartition has
> {code}
> } catch {
> case e: SQLException =>
> val cause = e.getNextException
> if (cause != null && e.getCause != cause) {
> if (e.getCause == null) {
> e.initCause(cause)
> } else {
> e.addSuppressed(cause)
> }
> }
> {code}
> According to Throwable Java doc, {{initCause()}} throws an
> {{IllegalStateException}} "if this throwable was created with
> Throwable(Throwable) or Throwable(String,Throwable), or this method has
> already been called on this throwable". The code does check whether {{cause}}
> is {{null}} before initializing it. However, {{getCause()}} "returns the
> cause of this throwable or null if the cause is nonexistent or unknown." In
> other words, {{null}} is returned if {{cause}} already exists (which would
> result in {{IllegalStateException}}) but is unknown.
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