[KYUUBI #1509] Make KYUUBI_WORK_DIR_ROOT as the default root path.

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### _Why are the changes needed?_
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Make KYUUBI_WORK_DIR_ROOT as the default root path. For details: #1509.

### _How was this patch tested?_
- [X] Add some test cases that check the changes thoroughly including negative and positive cases if possible

- [X] Add screenshots for manual tests if appropriate

- [X] [Run test](https://kyuubi.readthedocs.io/en/latest/develop_tools/testing.html#running-tests) locally before make a pull request

Closes #1519 from wForget/KYUUBI-1509.

Closes #1509

ff078e5 [Wang Zhen] [KYUUBI-1509] Make KYUUBI_WORK_DIR_ROOT as the default root path.

Authored-by: Wang Zhen <wangzhen07@qiyi.com>
Signed-off-by: Kent Yao <yao@apache.org>

externals/kyuubi-spark-sql-engine/src/main/scala/org/apache/kyuubi/engine/spark/session/SparkSQLSessionManager.scala

@@ -20,7 +20,7 @@ package org.apache.kyuubi.engine.spark.session
 import org.apache.hive.service.rpc.thrift.TProtocolVersion
 import org.apache.spark.sql.SparkSession
 
-import org.apache.kyuubi.KyuubiSQLException
+import org.apache.kyuubi.{KyuubiSQLException, Utils}
 import org.apache.kyuubi.config.KyuubiConf
 import org.apache.kyuubi.config.KyuubiConf._
 import org.apache.kyuubi.engine.ShareLevel
@@ -42,7 +42,8 @@ class SparkSQLSessionManager private (name: String, spark: SparkSession)
   def this(spark: SparkSession) = this(classOf[SparkSQLSessionManager].getSimpleName, spark)
 
   override def initialize(conf: KyuubiConf): Unit = {
-    _operationLogRoot = Some(conf.get(ENGINE_OPERATION_LOG_DIR_ROOT))
+    val absPath = Utils.getAbsolutePathFromWork(conf.get(ENGINE_OPERATION_LOG_DIR_ROOT))
+    _operationLogRoot = Some(absPath.toAbsolutePath.toString)
     super.initialize(conf)
   }
 

kyuubi-common/src/main/scala/org/apache/kyuubi/Utils.scala

@@ -103,6 +103,19 @@ object Utils extends Logging {
       error)
   }
 
+  def getAbsolutePathFromWork(pathStr: String, env: Map[String, String] = sys.env): Path = {
+    val path = Paths.get(pathStr)
+    if (path.isAbsolute) {
+      path
+    } else {
+      val workDir = env.get("KYUUBI_WORK_DIR_ROOT") match {
+        case Some(dir) => dir
+        case _ => System.getProperty("user.dir")
+      }
+      Paths.get(workDir, pathStr)
+    }
+  }
+
   /**
    * Delete a directory recursively.
    */

kyuubi-common/src/test/scala/org/apache/kyuubi/UtilsSuite.scala

@@ -19,7 +19,7 @@ package org.apache.kyuubi
 
 import java.io.{File, IOException}
 import java.net.InetAddress
-import java.nio.file.Files
+import java.nio.file.{Files, Paths}
 import java.security.PrivilegedExceptionAction
 import java.util.Properties
 
@@ -130,4 +130,14 @@ class UtilsSuite extends KyuubiFunSuite {
       assert(Utils.findLocalInetAddress !== InetAddress.getLocalHost)
     }
   }
+
+  test("getAbsolutePathFromWork") {
+    val workDir = System.getenv("KYUUBI_WORK_DIR_ROOT")
+    val path1 = "path1"
+    assert(Utils.getAbsolutePathFromWork(path1).toAbsolutePath.toString ===
+      Paths.get(workDir, path1).toAbsolutePath.toString)
+
+    val path2 = "/tmp/path2"
+    assert(Utils.getAbsolutePathFromWork(path2).toString === path2)
+  }
 }

kyuubi-metrics/src/main/scala/org/apache/kyuubi/metrics/JsonReporterService.scala

@@ -30,6 +30,7 @@ import com.codahale.metrics.MetricRegistry
 import com.codahale.metrics.json.MetricsModule
 import com.fasterxml.jackson.databind.ObjectMapper
 
+import org.apache.kyuubi.Utils
 import org.apache.kyuubi.config.KyuubiConf
 import org.apache.kyuubi.metrics.MetricsConf._
 import org.apache.kyuubi.service.AbstractService
@@ -43,7 +44,7 @@ class JsonReporterService(registry: MetricRegistry)
   private var reportPath: Path = _
 
   override def initialize(conf: KyuubiConf): Unit = synchronized {
-    reportDir = Paths.get(conf.get(METRICS_JSON_LOCATION)).toAbsolutePath
+    reportDir = Utils.getAbsolutePathFromWork(conf.get(METRICS_JSON_LOCATION))
     Files.createDirectories(reportDir)
     reportPath = Paths.get(reportDir.toString, "report.json").toAbsolutePath
     super.initialize(conf)

kyuubi-server/src/main/scala/org/apache/kyuubi/session/KyuubiSessionManager.scala

@@ -20,7 +20,7 @@ package org.apache.kyuubi.session
 import com.codahale.metrics.MetricRegistry
 import org.apache.hive.service.rpc.thrift.TProtocolVersion
 
-import org.apache.kyuubi.KyuubiSQLException
+import org.apache.kyuubi.{KyuubiSQLException, Utils}
 import org.apache.kyuubi.config.KyuubiConf
 import org.apache.kyuubi.config.KyuubiConf._
 import org.apache.kyuubi.credentials.HadoopCredentialsManager
@@ -37,7 +37,8 @@ class KyuubiSessionManager private (name: String) extends SessionManager(name) {
 
   override def initialize(conf: KyuubiConf): Unit = {
     addService(credentialsManager)
-    _operationLogRoot = Some(conf.get(SERVER_OPERATION_LOG_DIR_ROOT))
+    val absPath = Utils.getAbsolutePathFromWork(conf.get(SERVER_OPERATION_LOG_DIR_ROOT))
+    _operationLogRoot = Some(absPath.toAbsolutePath.toString)
     super.initialize(conf)
   }