Github user wangmiao1981 commented on the issue:
https://github.com/apache/spark/pull/18496
Actually, the udf in transform() of StringIndexer.scala, will throw an
exception in action. But, it doesn't stop the execution of collect().
val indexer = udf { label: String =>
if (label == null) {
if (keepInvalid) {
labels.length
} else {
throw new SparkException("StringIndexer encountered NULL value.
To handle or skip " +
"NULLS, try setting StringIndexer.handleInvalid.")
}
} else {
if (labelToIndex.contains(label)) {
labelToIndex(label)
} else if (keepInvalid) {
labels.length
} else {
throw new SparkException(s"Unseen label: $label. To handle
unseen labels, " +
s"set Param handleInvalid to ${StringIndexer.KEEP_INVALID}.")
<=== this is the exception.
}
}
}
I am asking other people who are familiar with this logic to understand why
it doesn't stop the collect().
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org
