GitHub user srowen opened a pull request:
https://github.com/apache/spark/pull/14054
[SPARK-16226] [SQL] Weaken JDBC isolation level to avoid locking when
writing partitions
## What changes were proposed in this pull request?
Saving partitions to JDBC in transaction can use a weaker transaction
isolation level to reduce locking. Use better method to check if transactions
are supported.
## How was this patch tested?
Existing Jenkins tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/srowen/spark SPARK-16226
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/14054.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 #14054
----
commit 1dd8495b0dc13e8c3ee1350c975b3a598b80d6f2
Author: Sean Owen <so...@cloudera.com>
Date: 2016-07-05T08:11:49Z
Saving partitions to JDBC in transaction can use a weaker transaction
isolation level to reduce locking. Use better method to check if transactions
are supported.
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