gatorsmile closed pull request #19605: [SPARK-22394] [SQL] Remove redundant
synchronization for metastore access
URL: https://github.com/apache/spark/pull/19605
This is a PR merged from a forked repository.
As GitHub hides the original diff on merge, it is displayed below for
the sake of provenance:
As this is a foreign pull request (from a fork), the diff is supplied
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diff --git
a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveExternalCatalog.scala
b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveExternalCatalog.scala
index 96dc983b0bfc6..4a99a59413ea0 100644
---
a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveExternalCatalog.scala
+++
b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveExternalCatalog.scala
@@ -89,10 +89,12 @@ private[spark] class HiveExternalCatalog(conf: SparkConf,
hadoopConf: Configurat
}
/**
- * Run some code involving `client` in a [[synchronized]] block and wrap
certain
- * exceptions thrown in the process in [[AnalysisException]].
+ * Run some code involving `client` and wrap certain exceptions thrown in
the process in
+ * [[AnalysisException]]. Thread-safety is guaranteed here because methods
in the `client`
+ * ([[org.apache.spark.sql.hive.client.HiveClientImpl]]) are already
synchronized through
+ * `clientLoader` in the `retryLocked` method.
*/
- private def withClient[T](body: => T): T = synchronized {
+ private def withClient[T](body: => T): T = {
try {
body
} catch {
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