Github user myui commented on the issue:
https://github.com/apache/incubator-hivemall/pull/62
@maropu Please check scalastyle check carefully.
```
error
file=/home/travis/build/apache/incubator-hivemall/spark/spark-2.1/src/main/scala/org/apache/spark/sql/execution/datasources/csv/csvExpressions.scala
message=Header does not match expected text line=2
Saving to
outputFile=/home/travis/build/apache/incubator-hivemall/spark/spark-2.1/target/scalastyle-output.xml
Processed 31 file(s)
Found 1 errors
Found 0 warnings
Found 0 infos
Finished in 2371 ms
[ERROR] Failed to execute goal
org.scalastyle:scalastyle-maven-plugin:0.8.0:check (default-cli) on project
hivemall-spark: Failed during scalastyle execution: You have 1 Scalastyle
violation(s). -> [Help 1]
```
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