Github user marmbrus commented on the pull request:
https://github.com/apache/spark/pull/1003#issuecomment-45406570
> `Caused by:
org.apache.spark.sql.catalyst.errors.package$TreeNodeException: Failed to copy
node. Is otherCopyArgs specified correctly for ExplainCommandPhysical?, tree:`
Second parameter lists aren't automatically copied. You'll need to add
`override def otherCopyArgs = sc :: Nil`
---
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.
---
