Github user attilapiros commented on a diff in the pull request: https://github.com/apache/spark/pull/21068#discussion_r185791498 --- Diff: resource-managers/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnAllocatorBlacklistTrackerSuite.scala --- @@ -0,0 +1,144 @@ +/* + * 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.spark.deploy.yarn + +import java.util.Arrays +import java.util.Collections + +import org.apache.hadoop.yarn.client.api.AMRMClient +import org.apache.hadoop.yarn.client.api.AMRMClient.ContainerRequest +import org.mockito.Mockito._ +import org.scalatest.{BeforeAndAfterEach, Matchers} + +import org.apache.spark.{SparkConf, SparkFunSuite} +import org.apache.spark.deploy.yarn.config.YARN_EXECUTOR_LAUNCH_BLACKLIST_ENABLED +import org.apache.spark.internal.config.{MAX_FAILED_EXEC_PER_NODE, _} +import org.apache.spark.util.ManualClock + +class YarnAllocatorBlacklistTrackerSuite extends SparkFunSuite with Matchers + with BeforeAndAfterEach { + + val BLACKLIST_TIMEOUT = 100L + val MAX_FAILED_EXEC_PER_NODE_VALUE = 2 + + var amClientMock: AMRMClient[ContainerRequest] = _ + var yarnBlacklistTracker: YarnAllocatorBlacklistTracker = _ + var failureTracker: FailureTracker = _ + var clock: ManualClock = _ + + override def beforeEach(): Unit = { + val sparkConf = new SparkConf() + sparkConf.set(BLACKLIST_TIMEOUT_CONF, BLACKLIST_TIMEOUT) + sparkConf.set(YARN_EXECUTOR_LAUNCH_BLACKLIST_ENABLED, true) + sparkConf.set(MAX_FAILED_EXEC_PER_NODE, MAX_FAILED_EXEC_PER_NODE_VALUE) + clock = new ManualClock() + + amClientMock = mock(classOf[AMRMClient[ContainerRequest]]) + failureTracker = new FailureTracker(sparkConf, clock) + yarnBlacklistTracker = + new YarnAllocatorBlacklistTracker(sparkConf, amClientMock, failureTracker) + yarnBlacklistTracker.setNumClusterNodes(4) + super.beforeEach() + } + + test("expiring its own blacklisted nodes") { + (1 to MAX_FAILED_EXEC_PER_NODE_VALUE).foreach { + _ => { + yarnBlacklistTracker.handleResourceAllocationFailure(Some("host")) + // host should not be blacklisted at these failures as MAX_FAILED_EXEC_PER_NODE is 2 + verify(amClientMock, never()) + .updateBlacklist(Arrays.asList("host"), Collections.emptyList()) + } + } + + yarnBlacklistTracker.handleResourceAllocationFailure(Some("host")) + // the third failure on the host triggers the blacklisting + verify(amClientMock).updateBlacklist(Arrays.asList("host"), Collections.emptyList()) + + clock.advance(BLACKLIST_TIMEOUT) + + yarnBlacklistTracker.setSchedulerBlacklistedNodes(Map()) --- End diff -- It is needed to trigger synchronisation of blacklisted nodes with YARN. I have added a comment above.
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