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https://issues.apache.org/jira/browse/FLINK-4348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15430798#comment-15430798
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ASF GitHub Bot commented on FLINK-4348:
---------------------------------------
Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/2389#discussion_r75681431
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/rpc/resourcemanager/ResourceManagerToTaskExecutorHeartbeatScheduler.java
---
@@ -0,0 +1,242 @@
+/*
+ * 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.rpc.resourcemanager;
+
+import akka.dispatch.OnFailure;
+import akka.dispatch.OnSuccess;
+import org.apache.flink.runtime.clusterframework.types.ResourceID;
+import org.apache.flink.runtime.rpc.taskexecutor.SlotReport;
+import org.apache.flink.runtime.rpc.taskexecutor.TaskExecutorGateway;
+import org.slf4j.Logger;
+import scala.concurrent.Future;
+import scala.concurrent.duration.FiniteDuration;
+
+import java.util.UUID;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+
+import static org.apache.flink.util.Preconditions.checkState;
+
+/**
+ * heartbeat between ResourceManager and TaskManager, it is responsible
for schedule heartbeat and handle
+ * heartbeat lost cases
+ */
+public class ResourceManagerToTaskExecutorHeartbeatScheduler {
+
+ /** default heartbeat interval time in millisecond */
+ private static final long INITIAL_HEARTBEAT_INTERVAL_MILLIS = 5000;
+
+ /** default heartbeat timeout in millisecond */
+ private static final long INITIAL_HEARTBEAT_TIMEOUT_MILLIS = 200;
+
+ /** max heartbeat interval time in millisecond (which is used in retry
heartbeat case) */
+ private static final long MAX_HEARTBEAT_TIMEOUT_MILLIS = 30000;
+
+ /** if a failure except for timeout exception happened when trigger
heartbeat from resourceManager to taskManager , next attemp will start after
ERROR_HEARTBEAT_DELAY_MILLIS millisecond */
+ private static final long ERROR_HEARTBEAT_DELAY_MILLIS = 2000;
+
+ /** max heartbeat retry times when lost heartbeat */
+ private static final int MAX_ATTEMPT_TIMES = 8;
+
+ private final long heartbeatInterval;
+
+ private final long heartbeatTimeout;
+
+ private final long maxHeartbeatTimeout;
+
+ private final long delayOnError;
+
+ private final int maxAttempt;
+
+
+ /** taskManagerGateway to receive the heartbeat and report slot
allocation */
+ private final TaskExecutorGateway taskExecutorGateway;
+
+ /** the taskManager address */
+ private final String taskExecutorAddress;
+
+ /** identify the taskManager resourceID */
+ private final ResourceID resourceID;
+
+ /** identify the resourceManager rpc endpoint */
+ private final ResourceManager resourceManager;
+
+ private final UUID resourceManagerLeaderSessionID;
+
+ private final Logger log;
+
+ private volatile boolean closed;
+
+ /**
+ * ResourceManagerToTaskExecutorHeartbeatScheduler constructor
+ *
+ * @param resourceManager resourceManager which handles
heartbeat communication with taskManager
+ * @param taskExecutorGateway taskManager which receives heartbeat
from resourceManager and report its slot
+ * allocation to resourceManager
+ * @param taskExecutorAddress taskManager's address
+ * @param taskExecutorResourceID taskManager's resourceID
+ * @param log
+ */
+ public ResourceManagerToTaskExecutorHeartbeatScheduler(
--- End diff --
This would also allow to test this component more easily.
> Implement communication from ResourceManager to TaskManager
> -----------------------------------------------------------
>
> Key: FLINK-4348
> URL: https://issues.apache.org/jira/browse/FLINK-4348
> Project: Flink
> Issue Type: Sub-task
> Components: Cluster Management
> Reporter: Kurt Young
> Assignee: zhangjing
>
> There are mainly 3 logics initiated from RM to TM:
> * Heartbeat, RM use heartbeat to sync with TM's slot status
> * SlotRequest, when RM decides to assign slot to JM, should first try to send
> request to TM for slot. TM can either accept or reject this request.
> * FailureNotify, in some corner cases, TM will be marked as invalid by
> cluster manager master(e.g. yarn master), but TM itself does not realize. RM
> should send failure notify to TM and TM can terminate itself
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