GitHub user zsxwing opened a pull request:
https://github.com/apache/spark/pull/16230
[SPARK-13747][Core]Fix potential ThreadLocal leaks in RPC when using
ForkJoinPool
## What changes were proposed in this pull request?
Some places in SQL may call `RpcEndpointRef.askWithRetry` (e.g.,
ParquetFileFormat.buildReader -> SparkContext.broadcast -> ... ->
BlockManagerMaster.updateBlockInfo -> RpcEndpointRef.askWithRetry), which will
finally call `Await.result`. It may cause `java.lang.IllegalArgumentException:
spark.sql.execution.id is already set` when running in Scala ForkJoinPool.
This PR includes the following changes to fix this issue:
- Removed `ThreadUtils.awaitResult`
- Renamed `ThreadUtils. awaitResultInForkJoinSafely` to
`ThreadUtils.awaitResult`
- Replaced `Await.result` in RpcTimeout with `ThreadUtils.awaitResult`.
## How was this patch tested?
Jenkins
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zsxwing/spark fix-SPARK-13747
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16230.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 #16230
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commit 68ae0ed3266787944952c01bdd4f1eb7cbfc42a0
Author: Shixiong Zhu <shixi...@databricks.com>
Date: 2016-12-09T07:22:46Z
Fix potential ThreadLocal leaks when using ForkJoinPool
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