Github user tillrohrmann commented on a diff in the pull request:

    https://github.com/apache/flink/pull/2744#discussion_r89360108
  
    --- Diff: 
flink-yarn/src/main/java/org/apache/flink/yarn/YarnFlinkApplicationMasterRunner.java
 ---
    @@ -0,0 +1,612 @@
    +/*
    + * 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.flink.yarn;
    +
    +import akka.actor.ActorSystem;
    +import org.apache.flink.api.common.JobExecutionResult;
    +import org.apache.flink.api.common.time.Time;
    +import org.apache.flink.configuration.ConfigConstants;
    +import org.apache.flink.configuration.Configuration;
    +import org.apache.flink.configuration.GlobalConfiguration;
    +import org.apache.flink.configuration.HighAvailabilityOptions;
    +import org.apache.flink.runtime.akka.AkkaUtils;
    +import org.apache.flink.runtime.client.JobExecutionException;
    +import org.apache.flink.runtime.clusterframework.ApplicationStatus;
    +import org.apache.flink.runtime.clusterframework.BootstrapTools;
    +import 
org.apache.flink.runtime.execution.librarycache.BlobLibraryCacheManager;
    +import org.apache.flink.runtime.highavailability.HighAvailabilityServices;
    +import 
org.apache.flink.runtime.highavailability.HighAvailabilityServicesUtils;
    +import org.apache.flink.runtime.jobgraph.JobGraph;
    +import org.apache.flink.runtime.jobmanager.OnCompletionActions;
    +import org.apache.flink.runtime.jobmaster.JobManagerServices;
    +import org.apache.flink.runtime.jobmaster.JobMaster;
    +import org.apache.flink.runtime.leaderelection.LeaderContender;
    +import org.apache.flink.runtime.leaderelection.LeaderElectionService;
    +import org.apache.flink.runtime.metrics.MetricRegistry;
    +import org.apache.flink.runtime.metrics.MetricRegistryConfiguration;
    +import org.apache.flink.runtime.metrics.groups.JobManagerMetricGroup;
    +import org.apache.flink.runtime.resourcemanager.JobLeaderIdService;
    +import org.apache.flink.runtime.resourcemanager.ResourceManager;
    +import 
org.apache.flink.runtime.resourcemanager.ResourceManagerConfiguration;
    +import 
org.apache.flink.runtime.resourcemanager.exceptions.ConfigurationException;
    +import 
org.apache.flink.runtime.resourcemanager.slotmanager.DefaultSlotManager;
    +import 
org.apache.flink.runtime.resourcemanager.slotmanager.SlotManagerFactory;
    +import org.apache.flink.runtime.rpc.FatalErrorHandler;
    +import org.apache.flink.runtime.rpc.RpcService;
    +import org.apache.flink.runtime.rpc.akka.AkkaRpcService;
    +import org.apache.flink.runtime.security.SecurityContext;
    +import org.apache.flink.runtime.util.EnvironmentInformation;
    +import org.apache.flink.runtime.util.JvmShutdownSafeguard;
    +import org.apache.flink.runtime.util.SignalHandler;
    +import org.apache.flink.yarn.cli.FlinkYarnSessionCli;
    +import org.apache.hadoop.fs.CommonConfigurationKeysPublic;
    +import org.apache.hadoop.security.UserGroupInformation;
    +import org.apache.hadoop.yarn.api.ApplicationConstants.Environment;
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +import scala.concurrent.duration.FiniteDuration;
    +
    +import javax.annotation.concurrent.GuardedBy;
    +
    +import java.io.File;
    +import java.io.FileInputStream;
    +import java.io.IOException;
    +import java.io.ObjectInputStream;
    +import java.util.Map;
    +import java.util.UUID;
    +
    +/**
    + * This class is the executable entry point for the YARN application 
master.
    + * It starts actor system and the actors for {@link 
org.apache.flink.runtime.jobmaster.JobMaster}
    + * and {@link org.apache.flink.yarn.YarnResourceManager}.
    + *
    + * The JobMasters handles Flink job execution, while the 
YarnResourceManager handles container
    + * allocation and failure detection.
    + */
    +public class YarnFlinkApplicationMasterRunner implements LeaderContender, 
OnCompletionActions, FatalErrorHandler {
    --- End diff --
    
    The current implementation tries to solve the Yarn cluster per job 
scenario, right? Maybe we could refactor the code such that we have 
`AbstractYarnFlinkApplicationMasterRunner` which does the generic Yarn 
initialization and two specializations `YarnPerJobFlinkApplicationMasterRunner` 
and `YarnClusterFlinkApplicationRunner`. The former basically works as this 
one. It starts a `ResourceManager` and a `JobManager` with the provided user 
code jar. The latter starts a `Dispatcher` (still to be implemented) and a 
`ResourceManager`. The `Dispatcher's` task is to receive job submission 
requests and to spawn for each request a new `JobMaster`. Then `JobMaster` is 
then responsible to run the submitted job.


---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---

Reply via email to