GitHub user xuanyuanking opened a pull request:
https://github.com/apache/spark/pull/16350
[SPARK-18700][SQL][BACKPORT-2.0] Add StripedLock for each table's relation
in cache
## What changes were proposed in this pull request?
Backport of #16135 to branch-2.0
## How was this patch tested?
Because of the diff between branch-2.0 and master/2.1, here add a
multi-thread access table test in `HiveMetadataCacheSuite` and check it only
loading once using metrics in `HiveCatalogMetrics`
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/xuanyuanking/spark SPARK-18700-2.0
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16350.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 #16350
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commit 132d12ee1457c41a0bec56516ab5a41d36d8ac1f
Author: xuanyuanking <xyliyuanj...@gmail.com>
Date: 2016-12-20T10:50:03Z
SPARK-18700: Add StripedLock for each table's relation in cache
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