GitHub user maropu opened a pull request:
https://github.com/apache/spark/pull/18250
[SPARK-21024][SQL] CSV parse mode handles Univocity parser exceptions
## What changes were proposed in this pull request?
This pr fixed code to handle Univocity parser exceptions by CSV parse modes.
The current master cannot skip the illegal records that Univocity parsers:
```
scala> Seq("0,1", "0,1,2,3").toDF().write.text("/Users/maropu/Desktop/data")
scala> val df = spark.read.format("csv").schema("a int, b
int").option("maxColumns", "3").load("/Users/maropu/Desktop/data")
scala> df.show
com.univocity.parsers.common.TextParsingException:
java.lang.ArrayIndexOutOfBoundsException - 3
Hint: Number of columns processed may have exceeded limit of 3 columns. Use
settings.setMaxColumns(int) to define the maximum number of columns your input
can have
Ensure your configuration is correct, with delimiters, quotes and escape
sequences that match the input format you are trying to parse
Parser Configuration: CsvParserSettings:
Auto configuration enabled=true
Autodetect column delimiter=false
Autodetect quotes=false
Column reordering enabled=true
Empty value=null
Escape unquoted values=false
...
at
com.univocity.parsers.common.AbstractParser.handleException(AbstractParser.java:339)
at
com.univocity.parsers.common.AbstractParser.handleEOF(AbstractParser.java:195)
at
com.univocity.parsers.common.AbstractParser.parseLine(AbstractParser.java:544)
at
org.apache.spark.sql.execution.datasources.csv.UnivocityParser.parse(UnivocityParser.scala:191)
at
org.apache.spark.sql.execution.datasources.csv.UnivocityParser$$anonfun$5.apply(UnivocityParser.scala:308)
at
org.apache.spark.sql.execution.datasources.csv.UnivocityParser$$anonfun$5.apply(UnivocityParser.scala:308)
at
org.apache.spark.sql.execution.datasources.FailureSafeParser.parse(FailureSafeParser.scala:60)
at
org.apache.spark.sql.execution.datasources.csv.UnivocityParser$$anonfun$parseIterator$1.apply(UnivocityParser.scala:312)
at
org.apache.spark.sql.execution.datasources.csv.UnivocityParser$$anonfun$parseIterator$1.apply(UnivocityParser.scala:312)
at scala.collection.Iterator$$anon$12.nextCur(Iterator.scala:434)
at scala.collection.Iterator$$anon$12.hasNext(Iterator.scala:440)
at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:408)
...
```
## How was this patch tested?
Added tests in `CSVSuite`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/maropu/spark SPARK-21024
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18250.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #18250
----
commit 5304fbd29f3c91fd8f37561e6f041db3a0289844
Author: Takeshi Yamamuro <[email protected]>
Date: 2017-06-08T15:42:23Z
Handle parser exceptions
----
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