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Subject [GitHub] [incubator-livy] wypoon commented on a change in pull request #284: [LIVY-752][THRIFT] Fix implementation of limits on connections.
Date Tue, 10 Mar 2020 00:28:45 GMT
wypoon commented on a change in pull request #284: [LIVY-752][THRIFT] Fix implementation of
limits on connections.
URL: https://github.com/apache/incubator-livy/pull/284#discussion_r390032685
 
 

 ##########
 File path: thriftserver/server/src/test/scala/org/apache/livy/thriftserver/TestLivyThriftSessionManager.scala
 ##########
 @@ -0,0 +1,127 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.livy.thriftserver
+
+import org.apache.hive.service.cli.HiveSQLException
+import org.junit.Assert._
+import org.junit.Test
+import org.mockito.Mockito.mock
+
+import org.apache.livy.LivyConf
+import org.apache.livy.server.AccessManager
+import org.apache.livy.server.recovery.{SessionStore, StateStore}
+import org.apache.livy.sessions.InteractiveSessionManager
+
+object ConnectionLimitType extends Enumeration {
+  type ConnectionLimitType = Value
+  val User, IpAddress, UserIpAddress = Value
+}
+
+class TestLivyThriftSessionManager {
+
+  import ConnectionLimitType._
+
+  private def createThriftSessionManager(
+      limitType: ConnectionLimitType): LivyThriftSessionManager = {
+    val conf = new LivyConf()
+    conf.set(LivyConf.LIVY_SPARK_VERSION, sys.env("LIVY_SPARK_VERSION"))
+    val limit = 3
+    val entry = limitType match {
+      case User => LivyConf.THRIFT_LIMIT_CONNECTIONS_PER_USER
+      case IpAddress => LivyConf.THRIFT_LIMIT_CONNECTIONS_PER_IPADDRESS
+      case UserIpAddress => LivyConf.THRIFT_LIMIT_CONNECTIONS_PER_USER_IPADDRESS
+    }
+    conf.set(entry, limit)
+    val server = new LivyThriftServer(
+      conf,
+      mock(classOf[InteractiveSessionManager]),
+      mock(classOf[SessionStore]),
+      mock(classOf[AccessManager])
+    )
+    new LivyThriftSessionManager(server, conf)
+  }
+
+  private def testLimit(
+      thriftSessionMgr: LivyThriftSessionManager,
+      user: String,
+      ipAddress: String,
+      forwardedAddresses: java.util.List[String],
+      msg: String): Unit = {
+    val failureMsg = "Should have thrown HiveSQLException"
+    try {
+      thriftSessionMgr.incrementConnections(user, ipAddress, forwardedAddresses)
+      fail(failureMsg)
+    } catch {
+      case e: HiveSQLException =>
+        assertEquals(msg, e.getMessage)
+      case _: Throwable =>
+        fail(failureMsg)
+    }
+  }
+
+  @Test
+  def testLimitConnectionsByUser(): Unit = {
+    val thriftSessionMgr = createThriftSessionManager(User)
+    val user = "alice"
+    val forwardedAddresses = new java.util.ArrayList[String]()
+    thriftSessionMgr.incrementConnections(user, "10.20.30.40", forwardedAddresses)
+    thriftSessionMgr.incrementConnections(user, "10.20.30.41", forwardedAddresses)
+    thriftSessionMgr.incrementConnections(user, "10.20.30.42", forwardedAddresses)
+    val msg = s"Connection limit per user reached (user: $user limit: 3)"
+    testLimit(thriftSessionMgr, user, "10.20.30.43", forwardedAddresses, msg)
+  }
+
+  @Test
+  def testLimitConnectionsByIpAddress(): Unit = {
+    val thriftSessionMgr = createThriftSessionManager(IpAddress)
+    val ipAddress = "10.20.30.40"
+    val forwardedAddresses = new java.util.ArrayList[String]()
+    thriftSessionMgr.incrementConnections("alice", ipAddress, forwardedAddresses)
+    thriftSessionMgr.incrementConnections("bob", ipAddress, forwardedAddresses)
+    thriftSessionMgr.incrementConnections("charlie", ipAddress, forwardedAddresses)
+    val msg = s"Connection limit per ipaddress reached (ipaddress: $ipAddress limit: 3)"
+    testLimit(thriftSessionMgr, "dan", ipAddress, forwardedAddresses, msg)
+  }
+
+  @Test
+  def testLimitConnectionsByUserAndIpAddress(): Unit = {
+    val thriftSessionMgr = createThriftSessionManager(UserIpAddress)
+    val user = "alice"
+    val ipAddress = "10.20.30.40"
+    val userAndAddress = user + ":" + ipAddress
+    val forwardedAddresses = new java.util.ArrayList[String]()
+    thriftSessionMgr.incrementConnections(user, ipAddress, forwardedAddresses)
+
+    // more than 3 connections from the same IP Address is ok if users are different
+    thriftSessionMgr.incrementConnections("bob", ipAddress, forwardedAddresses)
+    thriftSessionMgr.incrementConnections("charlie", ipAddress, forwardedAddresses)
+    thriftSessionMgr.incrementConnections("dan", ipAddress, forwardedAddresses)
+
+    // more than 3 connections from the same user is ok if IP addresses are different
+    thriftSessionMgr.incrementConnections(user, "10.20.30.41", forwardedAddresses)
+    thriftSessionMgr.incrementConnections(user, "10.20.30.42", forwardedAddresses)
+    thriftSessionMgr.incrementConnections(user, "10.20.30.43", forwardedAddresses)
+
+    thriftSessionMgr.incrementConnections(user, ipAddress, forwardedAddresses)
+    thriftSessionMgr.incrementConnections(user, ipAddress, forwardedAddresses)
+    val msg =
+      s"Connection limit per user:ipaddress reached (user:ipaddress: $userAndAddress limit:
3)"
+    testLimit(thriftSessionMgr, user, ipAddress, forwardedAddresses, msg)
+  }
+
 
 Review comment:
   I can add a case with multiple violations (the error message will the first violation since
that is how the logic goes), but there are a number of permutations, and I don't intend these
unit tests to be comprehensive. There were no tests on this area at all, so these ones, even
though basic, are already an improvement.

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