Github user scwf commented on the pull request:
https://github.com/apache/spark/pull/3761#issuecomment-67934889
This is because it always return ResponseCode(0), even if we pass a invalid
sql. So
```
if (ret != 0) {
console.printError(rc.getErrorMessage())
driver.close()
return ret
}
``` will be never executed.
And after we config ```hive.cli.print.header```
```
if (HiveConf.getBoolVar(conf, HiveConf.ConfVars.HIVE_CLI_PRINT_HEADER)) {
// Print the column names.
Option(driver.getSchema.getFieldSchemas).map { fields =>
out.println(fields.map(_.getName).mkString("\t"))
}
}
``` will throw NPE when passed in a invalid sql
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