GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/18187
[SPARK-20967][SQL] SharedState.externalCatalog is not really lazy
## What changes were proposed in this pull request?
`SharedState.externalCatalog` is marked as a `lazy val` but actually it's
not lazy. We access `externalCatalog` while initializing `SharedState` and thus
eliminate the effort of `lazy val`. When creating `ExternalCatalog` we will try
to connect to the metastore and may throw an error, so it makes sense to make
it a `lazy val` in `SharedState`.
## How was this patch tested?
existing tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark minor
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18187.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 #18187
----
commit 7d7331c987d9b15bd2b55efdc76da9d9e6ac078e
Author: Wenchen Fan <[email protected]>
Date: 2017-06-02T09:21:34Z
SharedState.externalCatalog is not really lazy
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