org.apache.flink.runtime.messages.Messages.scala Maven / Gradle / Ivy
/*
* 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.runtime.messages
import org.apache.flink.runtime.instance.InstanceID
/**
* Generic messages between JobManager, TaskManager, JobClient.
*/
object Messages {
/**
* Signals that the receiver (JobManager/TaskManager) shall disconnect the sender.
*
* The TaskManager may send this on shutdown to let the JobManager realize the TaskManager
* loss more quickly.
*
* The JobManager may send this message to its TaskManagers to let them clean up their
* tasks that depend on the JobManager and go into a clean state.
*
* @param cause The reason for disconnecting, to be displayed in log and error messages.
*/
case class Disconnect(instanceId: InstanceID, cause: Exception) extends RequiresLeaderSessionID
}