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[SPARK-17350][SQL] Disable default use of KryoSerializer in Thrift Server #14906

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[SPARK-17350][SQL] Disable default use of KryoSerializer in Thrift Server #14906

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5 changes: 2 additions & 3 deletions docs/configuration.md
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Original file line number Diff line number Diff line change
Expand Up @@ -744,7 +744,7 @@ Apart from these, the following properties are also available, and may be useful
</tr>
<tr>
<td><code>spark.kryo.referenceTracking</code></td>
<td>true (false when using Spark SQL Thrift Server)</td>
<td>true</td>
<td>
Whether to track references to the same object when serializing data with Kryo, which is
necessary if your object graphs have loops and useful for efficiency if they contain multiple
Expand Down Expand Up @@ -807,8 +807,7 @@ Apart from these, the following properties are also available, and may be useful
<tr>
<td><code>spark.serializer</code></td>
<td>
org.apache.spark.serializer.<br />JavaSerializer (org.apache.spark.serializer.<br />
KryoSerializer when using Spark SQL Thrift Server)
org.apache.spark.serializer.<br />JavaSerializer
</td>
<td>
Class to use for serializing objects that will be sent over the network or need to be cached
Expand Down
10 changes: 0 additions & 10 deletions ...hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLEnv.scala
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Expand Up @@ -19,8 +19,6 @@ package org.apache.spark.sql.hive.thriftserver

import java.io.PrintStream

import scala.collection.JavaConverters._

import org.apache.spark.{SparkConf, SparkContext}
import org.apache.spark.internal.Logging
import org.apache.spark.sql.{SparkSession, SQLContext}
Expand All @@ -37,8 +35,6 @@ private[hive] object SparkSQLEnv extends Logging {
def init() {
if (sqlContext == null) {
val sparkConf = new SparkConf(loadDefaults = true)
val maybeSerializer = sparkConf.getOption("spark.serializer")
val maybeKryoReferenceTracking = sparkConf.getOption("spark.kryo.referenceTracking")
// If user doesn't specify the appName, we want to get [SparkSQL::localHostName] instead of
// the default appName [SparkSQLCLIDriver] in cli or beeline.
val maybeAppName = sparkConf
Expand All @@ -47,12 +43,6 @@ private[hive] object SparkSQLEnv extends Logging {

sparkConf
.setAppName(maybeAppName.getOrElse(s"SparkSQL::${Utils.localHostName()}"))
.set(
"spark.serializer",
maybeSerializer.getOrElse("org.apache.spark.serializer.KryoSerializer"))
.set(
"spark.kryo.referenceTracking",
maybeKryoReferenceTracking.getOrElse("false"))

val sparkSession = SparkSession.builder.config(sparkConf).enableHiveSupport().getOrCreate()
sparkContext = sparkSession.sparkContext
Expand Down