Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/1616#discussion_r17083547
--- Diff: core/src/main/scala/org/apache/spark/util/Utils.scala ---
@@ -317,13 +317,58 @@ private[spark] object Utils extends Logging {
}
/**
+ * Copy cached file to targetDir, if not exists, download it from url
firstly.
--- End diff --
Minor nitpick on naming, but I think it's confusing to have a method named
`fetchCachedFile` with an option that has to be explicitly set in order to use
the cache. I'd prefer to name this `fetchFile`, and rename the other method to
something like `doFetchFile` or `_fetchFile`.
When fixing the merge conflict, do you mind moving the comment from the old
`fetchFile` to here? I think the most comprehensive documentation should be on
the public function, not the private one. I'd say something like
```scala
/**
* Download a file requested by the executor . Supports fetching the
file in a variety of ways,
* including HTTP, HDFS and files on a standard filesystem, based on the
URL parameter.
*
* If `useCache` is true, first attempts to fetch the file from a local
cache that's shared across
* executors running the same application.
*
* Throws SparkException if the target file already exists and has
different contents than
* the requested file.
*/
```
---
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 [email protected] or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
