| /** |
| * 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.hadoop.yarn.service; |
| |
| import org.apache.hadoop.yarn.service.component.Component; |
| import org.apache.hadoop.yarn.service.conf.YarnServiceConf; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import static org.apache.hadoop.yarn.service.conf.YarnServiceConf.DEFAULT_NODE_BLACKLIST_THRESHOLD; |
| import static org.apache.hadoop.yarn.service.conf.YarnServiceConf.NODE_BLACKLIST_THRESHOLD; |
| |
| /** |
| * This tracks the container failures per node. If the failure counter exceeds |
| * the maxFailurePerNode limit, it'll blacklist that node. |
| * |
| */ |
| public class ContainerFailureTracker { |
| |
| private static final Logger LOG = |
| LoggerFactory.getLogger(ContainerFailureTracker.class); |
| |
| // Host -> num container failures |
| private Map<String, Integer> failureCountPerNode = new HashMap<>(); |
| private Set<String> blackListedNodes = new HashSet<>(); |
| private ServiceContext context; |
| private int maxFailurePerNode; |
| private Component component; |
| |
| public ContainerFailureTracker(ServiceContext context, Component component) { |
| this.context = context; |
| this.component = component; |
| maxFailurePerNode = YarnServiceConf.getInt(NODE_BLACKLIST_THRESHOLD, |
| DEFAULT_NODE_BLACKLIST_THRESHOLD, component.getComponentSpec() |
| .getConfiguration(), context.scheduler.getConfig()); |
| } |
| |
| |
| public synchronized void incNodeFailure(String host) { |
| int num = 0; |
| if (failureCountPerNode.containsKey(host)) { |
| num = failureCountPerNode.get(host); |
| } |
| num++; |
| failureCountPerNode.put(host, num); |
| |
| // black list the node if exceed max failure |
| if (num > maxFailurePerNode && !blackListedNodes.contains(host)) { |
| List<String> blacklists = new ArrayList<>(); |
| blacklists.add(host); |
| blackListedNodes.add(host); |
| context.scheduler.getAmRMClient().updateBlacklist(blacklists, null); |
| LOG.info("[COMPONENT {}]: Failed {} times on this host, blacklisted {}." |
| + " Current list of blacklisted nodes: {}", |
| component.getName(), num, host, blackListedNodes); |
| } |
| } |
| |
| public synchronized void resetContainerFailures() { |
| // reset container failure counter per node |
| failureCountPerNode.clear(); |
| context.scheduler.getAmRMClient() |
| .updateBlacklist(null, new ArrayList<>(blackListedNodes)); |
| LOG.info("[COMPONENT {}]: Clearing blacklisted nodes {} ", |
| component.getName(), blackListedNodes); |
| blackListedNodes.clear(); |
| } |
| |
| } |