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[SPARK-2485][SQL] Lock usage of hive client.

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Author: Michael Armbrust <michael@databricks.com>

Closes #1412 from marmbrus/lockHiveClient and squashes the following commits:

4bc9d5a [Michael Armbrust] protected[hive]
22e9177 [Michael Armbrust] Add comments.
7aa8554 [Michael Armbrust] Don't lock on hive's object.
a6edc5f [Michael Armbrust] Lock usage of hive client.
This commit is contained in:
Michael Armbrust 2014-07-15 00:13:51 -07:00 committed by Aaron Davidson
parent c6d75745de
commit c7c7ac8339
1 changed files with 3 additions and 2 deletions
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5
sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
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@ -43,14 +43,15 @@ import scala.collection.JavaConversions._
private[hive] class HiveMetastoreCatalog(hive: HiveContext) extends Catalog with Logging {
import HiveMetastoreTypes._
val client = Hive.get(hive.hiveconf)
/** Connection to hive metastore. Usages should lock on `this`. */
protected[hive] val client = Hive.get(hive.hiveconf)
val caseSensitive: Boolean = false
def lookupRelation(
db: Option[String],
tableName: String,
alias: Option[String]): LogicalPlan = {
alias: Option[String]): LogicalPlan = synchronized {
val (dbName, tblName) = processDatabaseAndTableName(db, tableName)
val databaseName = dbName.getOrElse(hive.sessionState.getCurrentDatabase)
val table = client.getTable(databaseName, tblName)