GitHub user andrewor14 opened a pull request:
https://github.com/apache/spark/pull/11586
[SPARK-13747][SQL] Fix concurrent query with fork-join pool
## What changes were proposed in this pull request?
Fix this use case, which was already fixed in SPARK-10548 in 1.6 but was
broken in master due to #9264:
```
(1 to 100).par.foreach { _ => sc.parallelize(1 to 5).map { i => (i, i)
}.toDF("a", "b").count() }
```
This threw `IllegalArgumentException` consistently before this patch. For
more detail, see the JIRA.
## How was this patch tested?
New test in `SQLExecutionSuite`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/andrewor14/spark fix-concurrent-sql
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/11586.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 #11586
----
commit 661c28ec090c55bdfd536c6a41e5e57078a646a2
Author: Andrew Or <and...@databricks.com>
Date: 2016-03-08T20:35:45Z
Fix concurrent query with fork-join pool
----
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