GitHub user dongjoon-hyun opened a pull request:
https://github.com/apache/spark/pull/22902
[SPARK-25893][SQL] Show a directional error message for unsupported Hive
Metastore versions
## What changes were proposed in this pull request?
When `spark.sql.hive.metastore.version` is misconfigured, we had better
give a directional error message.
**BEFORE**
```scala
scala> sql("show databases").show
scala.MatchError: 2.4 (of class java.lang.String)
```
**AFTER**
```scala
scala> sql("show databases").show
java.lang.UnsupportedOperationException: Unsupported Hive Metastore version
(2.4). Please set spark.sql.hive.metastore.version with a valid version.
```
## How was this patch tested?
Manual.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dongjoon-hyun/spark SPARK-25893
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/22902.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #22902
----
commit b95a0d44bd459755e1050d1e0d66a679dabaf24b
Author: Dongjoon Hyun <dongjoon@...>
Date: 2018-10-31T09:18:59Z
[SPARK-25893][SQL] Show a directional error message for unsupported Hive
Metastore versions
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