[SQL] [TEST] [MINOR] Uses a temporary log4j.properties in HiveThriftS…

…erver2Test to ensure expected logging behavior

The `HiveThriftServer2Test` relies on proper logging behavior to assert whether the Thrift server daemon process is started successfully. However, some other jar files listed in the classpath may potentially contain an unexpected Log4J configuration file which overrides the logging behavior.

This PR writes a temporary `log4j.properties` and prepend it to driver classpath before starting the testing Thrift server process to ensure proper logging behavior.

cc andrewor14 yhuai

Author: Cheng Lian <[email protected]>

Closes #6493 from liancheng/override-log4j and squashes the following commits:

c489e0e [Cheng Lian] Fixes minor Scala styling issue
b46ef0d [Cheng Lian] Uses a temporary log4j.properties in HiveThriftServer2Test to ensure expected logging behavior

(cherry picked from commit 4782e13)
Signed-off-by: Andrew Or <[email protected]>

sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala

@@ -19,6 +19,8 @@ package org.apache.spark.sql.hive.thriftserver
 
 import java.io.File
 import java.net.URL
+import java.nio.charset.StandardCharsets
+import java.nio.file.{Files, Paths}
 import java.sql.{Date, DriverManager, Statement}
 
 import scala.collection.mutable.ArrayBuffer
@@ -54,7 +56,7 @@ class HiveThriftBinaryServerSuite extends HiveThriftJdbcTest {
   override def mode: ServerMode.Value = ServerMode.binary
 
   private def withCLIServiceClient(f: ThriftCLIServiceClient => Unit): Unit = {
-    // Transport creation logics below mimics HiveConnection.createBinaryTransport
+    // Transport creation logic below mimics HiveConnection.createBinaryTransport
     val rawTransport = new TSocket("localhost", serverPort)
     val user = System.getProperty("user.name")
     val transport = PlainSaslHelper.getPlainTransport(user, "anonymous", rawTransport)
@@ -391,10 +393,10 @@ abstract class HiveThriftJdbcTest extends HiveThriftServer2Test {
     val statements = connections.map(_.createStatement())
 
     try {
-      statements.zip(fs).map { case (s, f) => f(s) }
+      statements.zip(fs).foreach { case (s, f) => f(s) }
     } finally {
-      statements.map(_.close())
-      connections.map(_.close())
+      statements.foreach(_.close())
+      connections.foreach(_.close())
     }
   }
 
@@ -433,15 +435,32 @@ abstract class HiveThriftServer2Test extends FunSuite with BeforeAndAfterAll wit
       ConfVars.HIVE_SERVER2_THRIFT_HTTP_PORT
     }
 
+    val driverClassPath = {
+      // Writes a temporary log4j.properties and prepend it to driver classpath, so that it
+      // overrides all other potential log4j configurations contained in other dependency jar files.
+      val tempLog4jConf = Utils.createTempDir().getCanonicalPath
+
+      Files.write(
+        Paths.get(s"$tempLog4jConf/log4j.properties"),
+        """log4j.rootCategory=INFO, console
+          |log4j.appender.console=org.apache.log4j.ConsoleAppender
+          |log4j.appender.console.target=System.err
+          |log4j.appender.console.layout=org.apache.log4j.PatternLayout
+          |log4j.appender.console.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss} %p %c{1}: %m%n
+        """.stripMargin.getBytes(StandardCharsets.UTF_8))
+
+      tempLog4jConf + File.pathSeparator + sys.props("java.class.path")
+    }
+
     s"""$startScript
        |  --master local
-       |  --hiveconf hive.root.logger=INFO,console
        |  --hiveconf ${ConfVars.METASTORECONNECTURLKEY}=$metastoreJdbcUri
        |  --hiveconf ${ConfVars.METASTOREWAREHOUSE}=$warehousePath
        |  --hiveconf ${ConfVars.HIVE_SERVER2_THRIFT_BIND_HOST}=localhost
        |  --hiveconf ${ConfVars.HIVE_SERVER2_TRANSPORT_MODE}=$mode
        |  --hiveconf $portConf=$port
-       |  --driver-class-path ${sys.props("java.class.path")}
+       |  --driver-class-path $driverClassPath
+       |  --driver-java-options -Dlog4j.debug
        |  --conf spark.ui.enabled=false
      """.stripMargin.split("\\s+").toSeq
   }